Perrin's beaked whale ("Mesoplodon perrini") is part of the toothed whale suborder and is one of over 90 known cetaceans in existence today. Beaked whales are part of the family Ziphiidae, which are the second most diverse group out of all marine mammals with over 20 species currently recognized. Although diverse, little is understood about these timid, deep divers that can dive for up to two hours. The whales are partially named after their beak shaped jaw, which extends from their small head. The genus name "Mesoplodon" comes from the Greek meanings of "meso"- (middle), - "hopla" (arms), - "odon" (teeth), and may be translated as 'armed with a tooth in the center of the jaw'.