Information authenticated by WDCS, The Whale and Dolphin Conservation Society.
http://www.wdcs.org
Gestation: The state of being pregnant; the period from conception to birth.
Invertebrates: Animals with no backbone.
Rorqual: Derives from the Norwegian word meaning 'furrow whale', and refers to the folds or grooves of skin below the mouth that are a characteristic feature of the Baleanopteridae family of whales.