Askeptosaurus is an extinct genus of aquatic reptile related to the thalattosaurian group. Their remains have been found in Italy and Switzerland. Askeptosaurus was a very thin, elongated creature, that probably swam like an eel. Its tail was very long, accounting for around half of the animal's total length of 2 metres (6.6 ft), and its webbed feet would have been well suited for steering itself through the water. Judging from its long jaws, it primarily ate fish.