Rough-toothed Dolphin * Skeurtanddolfyn * Steno Bredanensis

Dolfyn
The rough-toothed dolphins prefer deep warm and tropical waters worldwide. They range from 2-2.8m (6.9 to 9.3 ft) in length and weigh between 90 and 155 kg (198 and 342 lb).

An average group has between 10 and 20 members. They can dive to 50m (160 ft) and can  stay underwater for at least fifteen minutes.
Sources:
(*) https://en.wikipedia.org/wiki/Rough-toothed_dolphin
(*) https://www.inaturalist.org/taxa/41545-Steno-bredanensis
(*) https://animalia.bio/rough-toothed-dolphin