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Post by brobear on Dec 27, 2020 13:21:54 GMT -5
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Post by brobear on Dec 27, 2020 17:35:04 GMT -5
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Post by OldGreenGrolar on Dec 27, 2020 18:55:51 GMT -5
This ultra black fish looks like an underwater sea reptile.
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Post by tom on Dec 28, 2020 17:54:28 GMT -5
Alien is right. Spooky looking.
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Post by brobear on Dec 29, 2020 7:25:01 GMT -5
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Post by brobear on Dec 31, 2020 8:06:24 GMT -5
www.sci-news.com/paleontology/megalodon-body-dimensions-08815.html Scientists Reconstruct Body Dimensions of Megalodon. A 16-m- (52.5-foot) long megalodon had a head 4.65 m (15.3 feet) long, a dorsal fin 1.62 m (5.3 feet) tall and a tail 3.85 m (9.4 feet) high, according to a study led by researchers from the University of Bristol and Swansea University.
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Post by brobear on Jan 11, 2021 6:15:51 GMT -5
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Post by brobear on Jan 12, 2021 17:37:30 GMT -5
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Post by brobear on Jan 13, 2021 9:50:08 GMT -5
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Post by OldGreenGrolar on Jan 14, 2021 1:07:42 GMT -5
I am not surprise if the Megalodon was a scaled up version of the great white shark.
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Post by brobear on Jan 26, 2021 4:44:02 GMT -5
palaeo-electronica.org/content/2021/3219-the-ecology-of-spinosaurus Spinosaurus is therefore best interpreted as shoreline generalist based on the available information. Capable of capturing both aquatic and terrestrial prey, and perhaps an opportunistic scavenger, adult Spinosaurus likely took aquatic prey by standing in shallow water or at the margins of water bodies. The nostril and eye positions, coupled with the skull shape and neck mechanics, would allow them to strike with a vertical slashing motion with the snout starting partially submerged. Standing in deeper water or even partially submerged (benefitting from reduced pneumaticity and pachyostotic bone) would allow them to forage for benthic prey or potentially lunge after faster animals. Individuals could forage in multiple different environments like this, reducing competition from both terrestrial and aquatic predators with an ability to use both and by being able to move between resource patches by walking or perhaps even swimming. Limited to swimming in shallow waters or to the surface of deeper water, they may have punted with limbs or used a combination of the tail and limbs together. In terms of competition, they would be able to walk between resource patches better than the crocodylians and then exploit aquatic prey better than theropods when they get there.
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Post by brobear on Feb 25, 2021 4:52:25 GMT -5
From... The Paleo Page. Stop playing with your food Livyatan melvillei ! In this case a poor Acrophoca longirostris (Swan-necked seal). This Miocene relative of sperm whales had the largest biting teeth of any animal (excluding tusks). by Rebecca Dart *Most posters, it appears, consider the giant shark Megalodon, as the 'Lord of the Sea' ( greatest aquatic predator ever ) but I think differently. I choose Livyatan melvillei ( the Leviathan Mobi Dick ).
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Post by theundertaker45 on Feb 28, 2021 7:00:59 GMT -5
The following comparison pictures Otodus Chubutensis (right) and Otodus Megalodon (left). Lengths were given as 12.2m for Chubutensis (based on the largest tooth of Calvert Cliffs Collection) and as 18m for Megalodon (based on the widest summed crown width in Leder et al's work); the models are by "SameerPrehistorica".
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Post by tom on Mar 4, 2021 9:05:13 GMT -5
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Post by brobear on Mar 21, 2021 6:34:13 GMT -5
WORLD OF PREHISTORIC CREATURES Pakicetus-The first ancestors of Whales Pakicetus is an extinct genus of amphibious cetacean of the family Pakicetidae, which was endemic to Pakistan during the Eocene, about 56 to 41 million years ago. It was an animal about the size of a dog, which lived in or near the water and ate fish and small animals. Wikipedia Higher classification: Pakicetidae Order: Even-toed ungulates Scientific name: Pakicetus Phylum: Chordata Rank: Genus By: David Mcbrown
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Post by brobear on Mar 22, 2021 4:05:35 GMT -5
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Post by brobear on Mar 24, 2021 4:13:28 GMT -5
www.popularmechanics.com/science/animals/a33918172/megalodon-official-size/?utm_campaign=socialflowFBPOP&utm_medium=social-media&utm_source=facebook&fbclid=IwAR0ollmgK0DCQKXiNeOiTxB6TZU-5ZBKjyElUQKY_qZvlmNsqyCslev65VI Science Confirms the Megalodon Was Just So, So Big! After the researchers studied the build and size of five ecologically and physiologically similar surviving shark relatives (the shortfin mako, the longfin mako, the salmon shark, the porbeagle, and of course, the great white), they deduced that a 52.5-foot long megalodon likely had the following measurements: a 15.3-foot-long head, a 5.3-foot-tall dorsal fin, and a 12.6-foot-high tail. As The Guardian points out, “this means an adult human could stand on the back of the shark and be about the same height as the dorsal fin.” The megalodon, which had a solid 13 million-year run as king of the sea, went extinct around 3.6 million years ago.
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Post by brobear on Mar 25, 2021 9:07:33 GMT -5
Megalodon Shark vs. the Leviathan Whale. Exact measurements are unclear; but these two apex predators were similar in size. One huge advantage for the Leviathan - they were pack-hunters. However, I would wager that these sea monsters avoided each other. Both could find an easier meal than each other.
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Post by tom on Mar 25, 2021 13:07:19 GMT -5
I can't help but wonder if a Megalodon could have survived. What wiped them out? Some researchers say Megalodon along with a wave of marine life perished potentially due to a supernova that triggered severe climate and biodiversity changes. Still others say they died off due to a lack of prey and increased competition from other predators. Lots of hypothesis but nothing proved. Could it be possible that some may have survived however few and still lurk today in the dark depths of the vast oceans. Lets face it there is far more water on earth than land and could it be possible such a prehistoric Shark could still exist yet just hasn't been seen. With the amount of ocean water out their scientists are still discovering new life forms in the extreme depths as we become able to search that deep. If a Megalodon did exist would it be reclusive and stay predominately in deep water? At least Hollywood's movie version of Megalodon makes you wonder??
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Post by brobear on Mar 25, 2021 14:10:47 GMT -5
Quote: Could it be possible that some may have survived however few and still lurk today in the dark depths of the vast oceans? *No way Jose. Megs were not deep-sea sharks. One thing that happened was that most of the large sea mammals moved into colder waters. One paleontologist suggested that the Orca out-competed the giant shark. I don't buy this because Orcas do not really prey primarily upon big whales ( as once thought ). But, the Orca did appear just as the Megs were disappearing. I often wonder about why many of those great animals perished. Some are great mysteries.
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