The Pygmy killer whale (Feresa attenuata) has a thin body with dark gray skin and less than three meters in length. Is not closely related to the orca.
The Peale’s dolphin (Lagenorhynchus australis) has a robust body and a striking coloration. It dwells the waters surrounding the Antarctic continent.
The Northern right whale dolphin (Lissodelphis borealis), has a thin and hydrodynamic body, a dark gray and white skin and lacks a dorsal fin.
The Melon-headed whale (Peponocephala electra) is a dolphin, larger than three meters, which dwells in the tropical and subtropical waters of the Atlantic, Pacific, and Indian Oceans.
The Long-finned pilot whale (Globicephala melas) is a dolphin that is commonly called whale because it reaches up to 25 feet long. It has a subpolar distribution.