Body shape: medium-sized, round body with a flat forehead and longish bill. The small triangular dorsal fin is located on the lower back.
Coloring: brown gray to blue gray uppersides, light grey face and undersides, The dorsal fin is darker, and the eyes have darker shin around them. Males are usually heavily scarred.
Distinct features: 1) they have a V-shaped pair of throat grooves that aid with suction feeding; and 2) males have a strongly curved lower jaw that raises above the upper jaw, as well as large, prominent pair of tusk-like teeth (up to 20 cm [~7.9″] in length) that protrude from bulges in the lower jaw. Female’s teeth remain hidden, and their jawline is less curved.
Life expectancy: unknown.
Local Research and Conservation Efforts The Bonaire Coastal Dolphin Project has been surveying dolphins since 2008. More recently (2011), the St. Maarten Nature Foundation launched the Marine Mammal Monitoring project, which takes place every year from February to May, and is a wide scale census of all marine mammals found within the territorial waters of St. Maarten/St.Martin. Did You Know?