Ancient sea creature suffered gruesome decapitation by dinosaur predator.

Fossils of the marine reptile Tanystropheus, which had an elongated neck useful for hunting, have provided the first unambiguous evidence of predation on long-necked marine reptiles. The fossils showed bite marks and other signs of trauma indicating decapitation. The neck of Tanystropheus was three times longer than its torso, making it vulnerable to predation. The attacker of the larger Tanystropheus species was likely a large marine reptile, while various marine reptiles or predatory fish could have decapitated the smaller species. Tanystropheus thrived across the northern hemisphere for 10 million years during the Triassic Period.