Galapagos shark

The Galapagos shark (Carcharhinus galapagensis) is a species of requiem shark, in the family Carcharhinidae, found worldwide. It favors clear reef environments around oceanic islands, where it is often the most abundant shark species. A large species that often reaches 3.0 m (9.8 ft), the Galapagos reef shark has a typical fusiform "reef shark" shape and is very difficult to distinguish from the dusky shark (C. obscurus) and the grey reef shark (C. amblyrhynchos). An identifying character of this species is its tall first dorsal fin, which has a slightly rounded tip and originates over the rear tips of the pectoral fins.

The Galapagos shark is an active predator often encountered in large groups. It feeds mainly on bottom-dwelling bony fishes and cephalopods; larger individuals have a much more varied diet, consuming other sharks, marine iguanas, sea lions, and even garbage. As in other requiem sharks, reproduction is viviparous, with females bearing litters of 4–16 pups every 2 to 3 years. The juveniles tend to remain in shallow water to avoid predation by the adults. The International Union for Conservation of Nature (IUCN) has assessed this species as least concern, but it has a slow reproductive rate and there is heavy fishing pressure across its range.

Taxonomy and phylogeny

The Galapagos shark was originally described as Carcharias galapagensis by Robert Evans Snodgrass and Edmund Heller in 1905; subsequent authors moved this species to the genus Carcharhinus. The holotype was a 65 cm (2.13 ft) long fetus from the Galapagos Islands, hence the specific epithet galapagensis.