The relatively large hind limbs of Eurhinosaurus suggested their use in steering and probably propulsion at a very low speed. The swimming style of Eurhinosaurus was thunniform. Their hypocercal caudal fin, which was mounted on the narrow peduncle, moved through the water in a sinuous curve by the powerful muscles of the posterior trunk and the anterior tail region.
Eurhinosaurus had large hind limbs indicating their use in steering and possibly propulsion at slow speeds. Its swimming technique was similar to that of a torpedo, with a thunniform style. The hypocercal caudal fin moved through the water in a wavelike motion thanks to powerful muscles in its back and tail.