Sperm Whale Sperm Whale: Photo by NOAA Photo Library on Flickr. LATIN NAME Physeter macrocephalus (AKA: carpenter fish, common cachalot; “cachalot” is derived from an archaic French word for “tooth”) LENGTH Up to 20.5 metres (67 ft) WEIGHT 57,000 kilograms (56 long tons; 63 short tons) LIFETIME Over 70 years PHYSICAL [...]