Fin whale

Scientific name: Balaenoptera physalus (from the Latin balaena = whale and the Greek pteron = wing or fin (to indicate the difference between Rorquals, which have a dorsal fin, and Right Whales, which do not), and phûseter = blower)

Sperm whale

Scientific name: Physeter catodon (from Greek physeter = phusa = wind and, by extension, phûseter = blower, and makro= large and képhalé= head)