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Only 3 ft long and weighs 10 pounds
Have have a sail on it's back that is most likely to attract females for mating -
armored, long-jawed, snaggletoothed ambush predators that proliferated through freshwater lakes and rivers.
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They are bipedal and didn't resemble modern crocodiles in behavior or body shape except the shape of their head.
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Looked and behaved like modern crocodiles but was twice as long and about 10 times as heavy.
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Is 35ft long and had a pelican-like jaw. Fed on planktons and krill despite its large jaw
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Was 35ft long with a head that is 6ft long. Fed on shellfish, and even tyrannosaurs
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Successful, agressive predator that awaits for it's prey with it's mouth wide open