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Post by skibidibopmmdada on Oct 6, 2022 17:06:59 GMT -5
I'd say they could handle an orca pretty well. Maybe even defeat it.
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Post by brobear on Oct 7, 2022 1:23:12 GMT -5
I'd say they could handle an orca pretty well. Maybe even defeat it. Quote: "Estimates from a few calcified remains of cartilaginous Ginsu sharks suggest they grew upwards of 24 feet (7 meters) long, similar in size to modern great white sharks." It's debatable, but I would wager on the Orca.
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Post by skibidibopmmdada on Oct 7, 2022 6:39:17 GMT -5
Perhaps an antarctic type A bull orca would defeat funny knife shark.
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Post by brobear on Oct 7, 2022 9:04:22 GMT -5
Perhaps an antarctic type A bull orca would defeat funny knife shark. There are pods of Orcas who regularly hunt and kill sharks. Male: Averages 5.8 to 6.7 m (19 to 22 ft.); largest males on record were 9.8 m (32 ft). Male: Averages 3,628 to 5,442 kg (8,000 to 12,000 lbs.); largest males recorded weighed 10,000 kg (22,000 lbs.). The shark is big, the Orca is bigger. Even bottle-nosed dolphins dominate similar-sized sharks. seaworld.org/animals/facts/mammals/killer-whale/
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Post by brobear on Oct 14, 2022 15:44:25 GMT -5
Amazing Footage Depicts The “Most Battered” Great White Shark Ever. weirdcheck.com/shark-stories/amazing-footage-depicts-the-most-battered-great-white-shark-ever/ A stunning video shows a battered great white shark covered in scars and bite marks after years of battles. The giant predator was spotted swimming near the Neptune Islands in South Australia, an area known to be home to an estimated 1,000 great whites. The clip shows the injured shark with marks all over its skin swimming among other small fish. Underwater cinematographer Dean Spraakman who captured the impressive footage during an expedition in January said despite his injuries the 11ft male was incredibly “friendly.” He claimed that the team could not be certain of what may have caused these marks as no one had come across a shark so badly injured before. Dean said they initially thought the scars might have been done by boat propellers or perhaps the shark had been caught in the tuna pens in the area but they quickly dismissed both theories. He said: “No one has ever seen a shark in a condition like this before. *Note: I have to wonder if possibly this shark has been captured and tortured by people, then released. -Just a thought.
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Post by brobear on Nov 10, 2022 13:19:04 GMT -5
40 million year old whale found in Egypt www.bbc.com/news/world-middle-east-58340807 Discovered in the Egyptian desert in 2021, these fossils belong to a 43-million-year-old prehistoric whale known as Phiomicetus anubis. Rather than simply swimming through the ocean and just opening its mouth to catch its prey, this fearsome underwater leviathan moved around on four legs and used its incredibly sharp teeth to rip its victims to pieces. Weighing in at 1,300 pounds, the Phiomicetus anubis has been compared to a cross between a killer whale and large dog, which sounds absolutely terrifying. This isn't the first whale with legs to be found, it is believed to be the earliest semi-aquatic species found in Africa.
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Post by brobear on Nov 12, 2022 9:34:56 GMT -5
Cameras attached to sharks discover unexplored underwater forest Read more: www.tweaktown.com/news/89389/cameras-attached-to-sharks-discover-unexplored-underwater-forest/index.html?fbclid=IwAR1GQVYJDjzvK3Gj-R6DakE6XxfSyTxWo0U1xMl_Nk4iNYa0EacMY318xUw A team of researchers attached cameras to a group of Tiger sharks to study the ocean floor, and what they discovered was amazing. The new study published in the scientific journal Nature Communications details a group of scientists attaching cameras and trackers to the dorsal fins of several Tiger sharks. These sharks then led the researchers to an incredible seabed in the Caribbean. The study explains that the sharks led the researchers to an underwater forest of seagrass that the team believes is approximately 35,000 miles in diameter. The authors behind the study say the discovery is a representation of how little humans know about the ocean. There isn't much knowledge on seagrass, but scientists do know that underwater forests of it are a prime feeding ground for marine life, while the forests also double as a storage facility for large amounts of carbon. Since underwater forests of seagrass are so vast, and are incredible for storing carbon, researchers believe studying these forests will influence humans' overall fight against climate change and slow its effects. Studying underwater forests of seagrass will allow scientists to understand how the carbon it's storing affects the planet.
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Post by OldGreenGrolar on Nov 22, 2022 6:35:39 GMT -5
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Post by brobear on Dec 4, 2022 8:42:40 GMT -5
1,700 dead seals found on Russia's Caspian coast abcnews.go.com/International/wireStory/1700-dead-seals-found-russias-caspian-coast-94429028 ByThe Associated Press December 4, 2022, 7:55 AM MOSCOW -- About 1,700 seals have been found dead on the Caspian Sea coast in southern Russia, officials said Sunday. The authorities in the Russian province of Dagestan said that it's still unclear what caused the animals' deaths, but they likely died of natural reasons. Regional officials initially said Saturday that 700 dead seals were found on the coast, but on Sunday Zaur Gapizov, head of the Caspian Environmental Protection Center, said according to the state RIA Novosti news agency that after a broader inspection of the coast the number of dead animals was 1,700. Gapizov said the seals likely died a couple of weeks ago. He added that there was no sign that they were killed by poachers. Experts of the Federal Fisheries Agency and prosecutors inspected the coastline and collected data for laboratory research, which didn't immediately spot any pollutants. Several previous incidents of mass deaths of seals were attributed to natural causes. The data about the number of seals in the Caspian varies widely. The fisheries agency has said the overall number of Caspian seals is 270,000-300,000, while Gapizov's center put the number at 70,000.
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Post by skibidibopmmdada on Dec 4, 2022 9:32:28 GMT -5
Guess they just wanted to go to heaven? I'm sure the fish there are much better.
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Post by brobear on Jan 2, 2023 8:02:33 GMT -5
Fish originally branded a ’66 million years ago living fossil’ amazes scientists again December 31, 2022 thepressagge.com/thach-fish-originally-branded-a-66-million-years-ago-living-fossil-amazes-scientists-again/?fbclid=IwAR34PexGGM9qa4LiVAIcnb6y7CskG-aJWha5tisnDSYFTffvuS6ejrM39BI June 18 (Reuters) – The coelacanth – a wondrous fish that was thought to have gone extinct along with the dinosaurs 66 million years ago before unexpectedly being found alive and well in 1938 off South Africa’s east coast – is offering up even more surprises. Scientists said a new study of these large and nocturnal deep-sea denizens shows that they boast a lifespan about five times longer than previously believed – roughly a century – and that females carry their young for five years, the longest-known gestation period of any animal.Focusing on one of the two living species of coelacanth (pronounced SEE-lah-canth), the scientists also determined that it develops and grows at among the slowest pace of any fish and does not reach sexual maturity until about age 55. The researchers used annual growth rings deposited on the fish’s scales to determine the age of individual coelacanths – “just as one reads tree rings,” said marine biologist Kélig Mahé of the French oceanographic institution IFREMER, lead author of the study published this week in the journal Current Biology.Coelacanths first appeared during the Devonian Period roughly 400 million years ago, about 170 million years before the dinosaurs. Based on the fossil record, they were thought to have vanished during the mass extinction that wiped out about three-quarters of Earth’s species following an asteroid strike at the end of the Cretaceous Period. After being found alive, the coelacanth was dubbed a “living fossil,” a description now shunned by scientists. “By definition, a fossil is dead, and the coelacanths have evolved a lot since the Devonian,” said biologist and study co-author Marc Herbin of the National Museum of Natural History in Paris. It is called a lobe-finned fish based on the shape of its fins, which differ structurally from other fish. Such fins are thought to have paved the way for the limbs of the first land vertebrates to evolve. Coelacanths reside at ocean depths of as much as half a mile (800 meters). During daylight hours they stay in volcanic caves alone or in small groups. Females are somewhat larger than males, reaching about seven feet (two meters) long and weighing 240 pounds (110 kg). The two extant species, both endangered, are the African coelacanth, found mainly near the Comoro Islands off the continent’s east coast, and the Indonesian coelacanth. The study focused on the African coelacanth, using scales from 27 individuals in two museum collections. Previous research had suggested roughly a 20-year lifespan and among the fastest body growth of any fish. It turns out that this was based on a misreading decades ago of another type of ring deposited in the scales. “After reappraisal of the coelacanth’s life history based on our new age estimation, it appears to be one of the slowest – if not the slowest – among all fish, close to deep-sea sharks and roughies,” said IFREMER marine evolutionary ecologist and study co-author Bruno Ernande. “A centenarian lifespan is quite something,” Ernande added. The Greenland shark, a big deep-ocean predator, can claim the distinction of being Earth’s longest-living vertebrate, with a lifespan reaching roughly 400 years. Ernande said the researchers were astounded when they figured out the coelacanth’s record gestation period, which exceeds the 3.5 years of frilled sharks and the two years of elephants and spiny dogfish sharks. The researchers said late sexual maturity and a lengthy gestation period, combined with low fecundity and a small population size, makes coelacanths particularly sensitive to natural or human-caused environmental disturbances such as extreme climate events or too much accidental fishing.
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Post by brobear on Jan 2, 2023 13:34:08 GMT -5
SPERM WHALES VS ORCA SPERM WHALES VS ORCA Sperm Whales vs Orca ScubaDiver | January 1, 2023 | Marine Life for Divers, Scuba Diving Videos & Photos, Whale Diving Sperm whales are amazing marine animals and quite capable in encounters between sperm whales vs orca encounters.
Sperm whales have many amazing abilities that are easily overlooked. However, they are key in their battles with their most formidable opponents, the orca.
They are the largest predators on the planet. Sperm whales are also known to have the largest brain of any known (living or extinct mammal). Therefore, like orca, sperm whales are also very intelligent. We all know that the speed, agility and intelligence of orcas places them at the top of the food chain as an apex predator. However, we don’t get to hear much about what a sperm whale vs orca encounter would play out.
Sperm whales are seen as vey friendly and mostly docile animals. However, they have special abilities and are quite capable at fending off predators as you will see in the clip below.
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Post by brobear on Jan 29, 2023 7:35:52 GMT -5
This is the creature that has great white sharks trembling with fear nypost.com/2023/01/20/the-creature-that-has-great-white-sharks-quaking-with-fear/?utm_source=FCFacebook&utm_campaign=SocialFlow&utm_medium=SocialFlow&fbclid=IwAR1B3HGtWkZ9j5aqmF37kAQGsJEIXpygnavMARyLhm12MD8x-Dn9oyHJvZY How the tides have turned. An unlikely pair of culprits have been scaring great white sharks away from the coast of South Africa for years, according to scientists who began noticing the absence of the dreaded apex predator along the country’s Western Cape — known as the global “Great White Capital” — back in 2017. What was first suspected to have been caused by human activities such as overfishing has now been pinned on something else entirely. According to new research, it’s a particularly vicious pair of orcas, or killer whales. Not only are they slaughtering the great whites en masse — eight carcasses have washed ashore since 2017 and many more deaths are suspected, per the latest reports — but the orcas are also tearing apart their prey to get at the hearts and nutrient-filled livers. “What we seem to be witnessing is a large-scale avoidance, mirroring what we see used by wild dogs in the Serengeti in Tanzania in response to increased lion presence,” said study lead and marine biologist Alison Towner. The mass exodus is encouraging a new mesopredator — the bronze whaler shark, which is known to be eaten by the great white — to flood the area, only to run into the apparently insatiable interlopers. “These Bronze Whalers are also being attacked by the Orcas too, who are indicating a level of experience and skill in hunting large sharks,” Towner said. *More information and video on site provided...
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Post by brobear on Feb 21, 2023 2:18:15 GMT -5
Record size hammerhead shark released out of respect ftw.usatoday.com/2022/07/record-size-hammerhead-shark-released-out-of-respect?csp=trueanthem&utm_campaign=trueAnthem%3A%20Trending%20Content&utm_medium=trueAnthem&utm_source=facebook&fbclid=IwAR0PSANOnN-Y6umg35M-hZwx7nnhJ0N4XyfHZ5vUanQDhwgRMsquGSFTX7s A pair of South Carolina anglers on Wednesday caught and released a hammerhead shark that was at least 400 pounds heavier than the longstanding state record, and perhaps rivaled the world record. Primary angler Pete Quartuccio and a friend teamed to reel the nearly 14-foot shark to leader after an hourlong fight, whereupon it was tagged and set free by Outcast Sportfishing Capt. Chip Michalove. Michalove estimated the shark’s weight at 1,000-plus pounds. The current South Carolina record, set in 1989, stands at 588 pounds. The world record is a 1,280-pound catch in 2006 off Boca Grande, Fla. The shark put up such a ferocious struggle, Michalove said, that Quartuccio and his buddy were too exhausted to pose for photos while the massive predator was alongside the boat. “They were so exhausted they could barely stand,” Michalove said. “Pete crashed on the cooler and laid there in exhaustion, and his friend was so tired that I barely convinced him to just hold the camera while I reached over and grabbed the shark’s head for one quick photo. “I tried to get them to lean over for a picture, but they wouldn’t budge. So I threw a quick tag in the shark, popped the hook and sent her off.” Michalove said he spotted the same hammerhead circling a bait during a Tuesday charter. On Wednesday, close to shore in rough weather, Quartuccio, a veteran shark angler, was at the rod when the shark took his bait. “She ripped off 400 yards in about 60 seconds,” Michalove recalled. “I released from the anchor and spun the boat to chase [the shark]. I knew she was going to be enormous, but I didn’t know of the enormity until we got her a little closer and I could see the width.” The group knew the shark might eclipse the world record in size, but at no point considered killing the shark to obtain an official weight. Said Michalove: “Fifteen years ago, I would’ve thrown a rope around her head and dragged her back to demolish the records. But these sharks have given me a good life and they’re too important to our fishery. “We’ve recaptured so many tigers, lemons, bulls, I owe them everything. I’ve gotten a few messages on how I should’ve dragged her back, but there’s not even a question that we did the right thing.”
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Post by brobear on Feb 21, 2023 2:19:14 GMT -5
13.5ft, over 1,000lbs, hammerhead this morning. We set out fully committed into finding the same hammer that was circling us yesterday and she was waiting. Tagged and released her healthy. Would’ve demolished our state record but love these fish too much to kill.
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Post by Deleted on Feb 24, 2023 20:01:34 GMT -5
I'd say they could handle an orca pretty well. Maybe even defeat it. Quote: "Estimates from a few calcified remains of cartilaginous Ginsu sharks suggest they grew upwards of 24 feet (7 meters) long, similar in size to modern great white sharks." It's debatable, but I would wager on the Orca. The largest was 8 meters and ~5,000 kilograms according to Wikipedia. And I think it should also be noted that this is only the largest specimen that we know of. It's likely that this individual was on the upper-end of the scale for this predator, but definitely not max-sized. I assume that Cretoxyrhina would've peaked at 9-10 meters in length, comparable in size to the largest orcas, but not quite as large as Cretoxyrhina's cretaceous rival Cretodus, another giant shark, that possibly exceeded 11 meters in length.
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Post by brobear on Feb 25, 2023 2:30:21 GMT -5
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Post by brobear on Mar 10, 2023 4:36:27 GMT -5
Ancient monster fish 'Dunk' was short and chunky, study finds www.livescience.com/360-million-year-old-alien-fish-wasnt-bus-size-but-barely-half-that-new-study-reveals?utm_content=livescience&utm_medium=social&utm_source=facebook.com&utm_campaign=socialflow&fbclid=IwAR0p24bm-mOtbJdh-RCuH1fw4Y_eTJhmBSC4BQ3R5S06-ZZFzjZ1RxM2jNo One of the largest ancient fish on record, known as Dunkleosteus, was actually half as long, but still super chunky, a new study finds. A 360 million-year-old sea monster that was once thought to be as big as a bus was actually less than half that long, but just as chunky, a new study finds. The bony fish Dunkleosteus terrelli, nicknamed "Dunk," was one of many superpredators that prowled the oceans during the Devonian period (419 million to 358 million years ago). This massive armored fish, which prowled the oceans that once covered modern-day Ohio, had blade-like jaws that could snap shut with 8,000 pounds (3,600 kilograms) of force. The first D. terrelli fossils were discovered 150 years ago along the shores of Lake Erie near the city of Cleveland, and the largest known specimen resides in the collections of the Cleveland Museum of Natural History. Unlike modern fish, which either have skeletons of cartilage or bone, D. terrelli had a bony, armored skull attached to a skeleton of cartilage. And the skull of D. terrelli was terrifying: at nearly 3 feet (85 centimeters) tall, it resembled the title character in the movie "Alien." But only the skulls of these creatures fossilized. So early researchers extrapolated D. terrelli's size from the relationship between a shark's skull size and its body length and left it at that. For the next 150 years, D. terrelli would become a local paleontology icon, even becoming Ohio's official prehistoric fish. Yet despite that, very little scientific work focused on D. terrelli. During the pandemic, Russell Engelman(opens in new tab), a doctoral student at Case Western University in Cleveland, Ohio, found himself unable to do his normal lab research. Instead, he went to the Cleveland Museum of Natural History to think about some research questions. While looking at the D. terrelli specimens, Engelman ran into a problem. "Everything in biology is influenced by body size," he told Live Science. "I tried using some of the old measurements, and biologically, they just didn't make sense." No matter how he tried, Engelman could not reconcile the skull with a 30-foot-long body. All of his reconstructions required strange, unrealistic body proportions that looked nothing like the original drawings of D. terrelli. Naturally, he decided to find out how the original researchers determined the size of D. terrelli, and that's when the real problem became apparent. "I went back through the literature, and it turned out that most previous authors who had talked about this were basically just eyeballing it," Engelman said. So Engelman measured the dimensions of various fish skulls and compared them with their body proportions. He found that skull size and shape are highly correlated with body proportions. When applied to D. terrelli, this analysis didn't just rule out the most extreme size estimates. It ruled them all out. Instead of being 30 feet long, D. terrelli was likely no longer than 13 feet (4 m), Engelman wrote in a study published on Feb. 21 in the journal Diversity(opens in new tab). Engelman's analysis examined a lot of fishy factors, but it ultimately boiled down to the height versus the width of the skull. Fish with longer skulls tend to have more elongated bodies, while fish with shorter skulls have shorter bodies. D. terrelli's relatively short head suggests it had a short, wide body more like a tuna than a shark. Engelman, was at first a little disappointed by the downgrade of Cleveland's paleontological mascot, but ultimately is excited by the result. If there's one lesson from this big fish story, it's that even paleoichthyologists can exaggerate the size of their catch from time to time.
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Post by Deleted on Mar 10, 2023 10:07:34 GMT -5
Ancient monster fish 'Dunk' was short and chunky, study finds www.livescience.com/360-million-year-old-alien-fish-wasnt-bus-size-but-barely-half-that-new-study-reveals?utm_content=livescience&utm_medium=social&utm_source=facebook.com&utm_campaign=socialflow&fbclid=IwAR0p24bm-mOtbJdh-RCuH1fw4Y_eTJhmBSC4BQ3R5S06-ZZFzjZ1RxM2jNo One of the largest ancient fish on record, known as Dunkleosteus, was actually half as long, but still super chunky, a new study finds. A 360 million-year-old sea monster that was once thought to be as big as a bus was actually less than half that long, but just as chunky, a new study finds. The bony fish Dunkleosteus terrelli, nicknamed "Dunk," was one of many superpredators that prowled the oceans during the Devonian period (419 million to 358 million years ago). This massive armored fish, which prowled the oceans that once covered modern-day Ohio, had blade-like jaws that could snap shut with 8,000 pounds (3,600 kilograms) of force. The first D. terrelli fossils were discovered 150 years ago along the shores of Lake Erie near the city of Cleveland, and the largest known specimen resides in the collections of the Cleveland Museum of Natural History. Unlike modern fish, which either have skeletons of cartilage or bone, D. terrelli had a bony, armored skull attached to a skeleton of cartilage. And the skull of D. terrelli was terrifying: at nearly 3 feet (85 centimeters) tall, it resembled the title character in the movie "Alien." But only the skulls of these creatures fossilized. So early researchers extrapolated D. terrelli's size from the relationship between a shark's skull size and its body length and left it at that. For the next 150 years, D. terrelli would become a local paleontology icon, even becoming Ohio's official prehistoric fish. Yet despite that, very little scientific work focused on D. terrelli. During the pandemic, Russell Engelman(opens in new tab), a doctoral student at Case Western University in Cleveland, Ohio, found himself unable to do his normal lab research. Instead, he went to the Cleveland Museum of Natural History to think about some research questions. While looking at the D. terrelli specimens, Engelman ran into a problem. "Everything in biology is influenced by body size," he told Live Science. "I tried using some of the old measurements, and biologically, they just didn't make sense." No matter how he tried, Engelman could not reconcile the skull with a 30-foot-long body. All of his reconstructions required strange, unrealistic body proportions that looked nothing like the original drawings of D. terrelli. Naturally, he decided to find out how the original researchers determined the size of D. terrelli, and that's when the real problem became apparent. "I went back through the literature, and it turned out that most previous authors who had talked about this were basically just eyeballing it," Engelman said. So Engelman measured the dimensions of various fish skulls and compared them with their body proportions. He found that skull size and shape are highly correlated with body proportions. When applied to D. terrelli, this analysis didn't just rule out the most extreme size estimates. It ruled them all out. Instead of being 30 feet long, D. terrelli was likely no longer than 13 feet (4 m), Engelman wrote in a study published on Feb. 21 in the journal Diversity(opens in new tab). Engelman's analysis examined a lot of fishy factors, but it ultimately boiled down to the height versus the width of the skull. Fish with longer skulls tend to have more elongated bodies, while fish with shorter skulls have shorter bodies. D. terrelli's relatively short head suggests it had a short, wide body more like a tuna than a shark. Engelman, was at first a little disappointed by the downgrade of Cleveland's paleontological mascot, but ultimately is excited by the result. If there's one lesson from this big fish story, it's that even paleoichthyologists can exaggerate the size of their catch from time to time. It’s amazing how bulky Dunkleosteus was relative to its size.
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Post by OldGreenGrolar on Mar 13, 2023 2:13:56 GMT -5
SHARK GILLS Sharks, like other fish, live in the water and use their gills to filter oxygen from the water. When water passes over the gills, a system of very fine blood vessels (capillaries) in the gills takes up (absorbs) oxygen from the water. Sharks have 5-7 pairs of gill slits located on the sides of their heads. Unlike bony fish, they do not have gill covers. Water must continually flow across these slits in order for the shark to breathe. This can be accomplished by the shark's swimming, by it standing still in a current, or by it fanning water across the gills with its fins (this is done by the nurse shark). Filter feeding sharks (like the whale sharkWhale shark, basking shark, and the megamouth shark) expel the filtered water through their gills. www.enchantedlearning.com/subjects/sharks/anatomy/Gills.shtml
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