What happened to sea dinosaurs?
Answer:
They evolved into different species
They died like the land ones for the same reasons.
There weren't any. The Plesiosaurs, Mosasaurs, and Ichtyosaurs were reptiles. The became extince at the same time as the Dinosaurs.
duhhhhhhhhhh they might have become crude oil
They are still alive. Sharks are actually older than the dinosaurs.
interestingly enough there were never any marine dinosaurs.what you are thinking of probably were ancient lizards but did not share the same lineage as dinosaurs..so to answer your question the extinction that wiped out the dinosaurs about 65 million years ago also affected the marine realm so many of the marine reptiles became extinct too..alligators and crocodiles are the closest living relatives to dinosaurs (not all that close and not coutning birds)
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