What animal with only four extant species was the name borne by four ships of the Royal Navy
Hyena Hyenas or hyaenas (from Greek ὕαινα "hýaina") are any feliform carnivoran mammals of the family Hyaenidae . With only four extant species, it is the fifth-smallest biological family in the Carnivora, and one of the smallest in the class Mammalia. Despite their low diversity, hyenas are unique and vital components of most African ecosystems.
HMS Otter (1896) HMS "Otter" was a Vickers three-funnel, 30-knot destroyer ordered by the Royal Navy under the 1895–1896 Naval Estimates. She was the fourth ship to carry this name since it was introduced in 1782 for a fire ship, sold in 1801.