Keichousaurus, like all sauropterygians, was highly adapted to the aquatic environment.
Individuals of this genus ranged up to 2.7 metres (8.9 ft) in length, and had both long necks and long tails, with elongated, five-toed feet.
The pointed head and sharp teeth in this genus also indicate that they were fish-eaters.
Some recovered specimens feature an especially developed ulna suggesting they may have spent some time on land or in marshes.

In addition fossil evidence suggest also a pair of fossilized pregnant marine reptiles called Keichousaurus hui, show they had a mobile pelvis to give birth to live young rather than laying eggs.
Keichousaurus, like all sauropterygians, was highly adapted to the aquatic environment. Individuals of this genus ranged up to 2.7 metres (8.9 ft) in length, and had both long necks and long tails, with elongated, five-toed feet. The pointed head and sharp teeth in this genus also indicate that they were fish-eaters. Some recovered specimens feature an especially developed ulna suggesting they may have spent some time on land or in marshes.
In addition fossil evidence suggest also a pair of fossilized pregnant marine reptiles called Keichousaurus hui, show they had a mobile pelvis to give birth to live young rather than laying eggs.
Keichousaurus