Southern Right Whale Dolphin * Suidelike Gladde Dolfyn * Lissodelphis Peronii

By Chris_huh - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2161509
Walvis Dolfyn
The absence of a dorsal fin is unique to this species.  They feature bodies that are streamlined and graceful, a single blowhole, and a short beak. 

Adults typically weigh between 60-100 kg (130-220 lb) and their length is between 2.18 and 2.5 m (7 ft 2 in and 8 ft 2 in). 

The range is associated with the cold currents up the western and southern shores of Southern Africa. The species has been discovered to exist year-round in a small location of L├╝deritz on Namibia's southwest coast. There has only been one documented sighting of the species off the coast of South Africa, just south of the Orange River.

Whaling activities in the 19th century killed southern right whale dolphins mostly for their meat. 
Sources:
(*) https://en.wikipedia.org/wiki/Southern_right_whale_dolphin
(*) https://www.inaturalist.org/taxa/41536-Lissodelphis-peronii
(*) https://animalia.bio/southern-right-whale-dolphin