Atlantic Humpback Dolphin, Sousa teuszii, has been suggested to have most likely inhabited the Niger Delta before the large scale oil exploration and has been said by one D.W. Rice to have originated from Nigeria’s 853 km coastline bordering the northern Gulf of Guinea. Generally, the species is endemic to the eastern tropical Atlantic, where it is limited to coastal and inshore waters, ranging on the coast of West Africa from western Sahara south to Angola.
This specie of dolphin is distinguished by its uniquely elevated and rounded dorsal fin. It is gray in color with lighter speckles markings along the ventral. Adult weigh is from 100 to 150 kg and length is from 2 to 2.5 m. it surfaces briefly about every one-minute and swims about five kilometers in an hour.
This mammalian species, like other cetaceans have been reported to suffer habitat degradation in Nigerian coast as astronomically high volume of solid waste/debris was recorded against the mega-fauna fish catch at a ratio which ranged between 4 : 1 and 8 : 1 respectively.
