Derived from an old diminutive of MARTIN. MAXWELL Scottish. From a place name meaning Mack's stream, from the name Mack, a short form of the Scandinavian name MAGNUS, combined with Old English wella stream ...
For the ray-finned fish known as common dolphin, see Mahi-mahi. The common dolphin is the name given to two species (and possibly a third) of dolphin making up the genus Delphinus. Prior to the mid-1990s, most taxonomists only recognised one species in this genus, the common dolphin Delphinus delphis.
5 Interesting Facts About Dolphins. Dolphin. ======. Dolphins are cetacean mammals closely related to whales and porpoises. There are almost forty species of dolphin in 17 genera. They vary in size from 1.2 m (4 ft) and 40 kg (90 lb) (Maui's dolphin), up to 9.5 m (30 ft) and 10 tonnes (9.8 long tons; 11 short tons) (the orca or killer whale).