Arnoux's Beaked Whale or Southern Four-toothed Whale * Suidelike Swartdolfyn * Berardius Arnuxii

Walvis
Very little is known about this whale. When they achieve sexual maturity, their lower jaw is longer than their upper jaw, and once closed completely, the front teeth are still visible. They have been seen around South Georgia and South Africa.

Their maximum length is about 10m and their maximum weight is about 9 metric tons.
Other Common Names
English
Southern Beaked Whale
New Zealand Beaked Whale
Southern Giant Bottlenose Whale
Southern Porpoise Whale

Sources:
(*) https://en.wikipedia.org/wiki/Arnoux%27s_beaked_whale
(*) https://www.inaturalist.org/taxa/41425-Berardius-arnuxii