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There are no names of underwater dinosaurs because there were no underwater dinosaurs. Sea reptiles that lived at the same time as the dinosaurs were around. Names of these sea-living reptiles include: Liopleurodon, Opthalmosaurus and Tylosaurus.

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14y ago
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10y ago

No known dinosaurs lived underwater, except some types of birds, which are technically dinosaurs. These would include some Hesperornithiformes. Large reptiles that lived in the sea alongside dinosaurs include plesiosaurs, pliosaurs, mosasaurs, and ichthyosaurs.

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12y ago

Plesiosaur. It should be noted, though that while plesiousaurs lived in dinosaurs times, they technically were not dinosaurs but a related branch of reptiles.

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14y ago

The largest is leedsichthys.

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tarbosaurus

Lvl 1
3y ago
the largest semi aquatic dinosaur is spinosaurus

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Q: What is the name of an underwater dinosaur?
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