the hisory in sea turtles

The oldest fossils were found in Germany date back 215 years,
during the Triassic period.

They were among the oldest fossils of four-legged animals
and one of the Earths most ancient creatures .

These ancestral turtles had completely formed shells and lived
on land ,in marshes. Turtles appeared before Dinosaurs ,and were present for the evolution of birds from feathered dinosaurs .
It is not yet known when these turtles shifted into the ocean,
becoming sea turtles , but over the eons ,sea turtles have adapted
very well to a marine environment .

-sea turtles rid themselves of excess through tear glands ,the salt water ingested with food is eliminated by the contractions of the esophagus to push out excess water whenever food is swallowed