Many of the fishes found on and around coral reefs belong to this group, and many of these feed on cephalopods in one form or another. Reptiles are nowadays not an important group of marine vertebrates when numbers are concerned. The situation was very different, however, in the Mesozoic. They probably performed the same predatory role as large whales do today. In some ammonite fossils there are marks of teeth from contemporary predators, giving direct evidence that cephalopods played an important part in their diet.
Many seabirds make a living by feeding on cephalopods.
This is especially true in the Antarctic, where so many different birds are present. These birds, which can dive down to considerable depths, can forage both during day and night. These birds are not well equipped for deep dives, but birds such as gannets are. Presumably the light organs make it easier for the birds to see the cephalopods. Although some birds will feed off remains left behind by sperm whales, or by scavenging dead squids, most of the squids found in their stomachs are 'self-caught'.