More than 99.99% of the dolphins found around the Archipelago of Fernando de Noronha belong to the spinner dolphin species, Stenella longirostris, from the Delphinidae Family.
Currently, the following subspecies are recognized for the Stenella longirostris Species: Stenella longirostris longirostris, S. l. orientalis, S. l. central american and S. l. roseiventris. The Spinner Dolphin that occurs in Fernando de Noronha belongs to the subspecies S. l. longirostris, known as Hawaiian spinner.
The spinner dolphin is scientifically known as “Stenella” because of its slender body and “longirostris” because of its long beak. The popular name for spinner dolphin is due to its behavior of jumping out of the water and performing up to seven rotations around its axis.
The spinners found around Fernando de Noronha’s Archipelago reach maximum 2 meters in length, 75 kg in weight and have a tricolor pattern: dark gray on the back, light gray on the flanks and white on the belly.