Some people believe that some descendants of the dinosaurs that live in the sea include crocodiles or alligators. These animals have been on the planet for millions of years.
None. No Dinosaurs lived in the sea because what did live there were sea-dwelling Reptiles. These were NOT Dinosaurs.
When the dinosaurs lived there were sea monsters but they were called marine reptiles and were not dinosaurs.
Some sea creatures have ansetors of dinosaurs
I guess water dinosaurs did :)
Some of the smallest may have lived in the trees, but if the question means "Did dinosaurs live in the oceans?" the answer is no. There were sea-dwelling reptiles, but these weren't dinosaurs.
Dinosaurs that lived in the sea are generally referred to as marine reptiles, not dinosaurs. These marine reptiles include creatures like ichthyosaurs, plesiosaurs, and mosasaurs.
177,000,000 years ago ate other sea dinosaurs
There was absolutely no life on land before the dinosaurs. Every living creature was in the sea before dinosaurs roamed the Earth.
Dinosaurs never lived underwater. There were marine reptiles that are sometimes inaccurately called dinosaurs; these include icthyosaurs, mosasaurs, plesiosaurs, and pliosaurs. All of these are extinct. There are a few marine reptiles alive today, though. These are sea turtles, sea snakes, and the semi-aquatic marine iguana.
No! Although this is a common mistake, all dinosaurs were land animals. All animals that lived in the sea at the same time as the dinosaurs weren't actually classed as dinosaurs even though they have similarities :)
Dinosaurs
no