Boto  (Inia geoffrensis)

Beak: The bill of a bird. In cetacea (whales and dolphins): the elongated forward part of the head, comprising the lower jaw and upper jaw or ‘rostrum'.
Bycatch: In the fishing industry, the part of the catch made up of non-target species.
Dorsal fin: The unpaired fin found on the back of the body of fish, or the raised structure on the back of most cetaceans.
Echolocation: Detecting objects by reflected sound. Used for orientation and detecting and locating prey by bats and cetacea (whales and dolphins).
Gestation: The state of being pregnant; the period from conception to birth.
Melon: In cetaceans, the bulging forehead belonging to a number of species, which contains oil, muscles and nasal passages and is though to focus sound during echolocation.
Subspecies: A different race of a species, which is geographically separated from other populations of that species.

1. IUCN Red List (March, 2008)
   http://www.iucnredlist.org
   
2. WDCS, The Whale and Dolphin Conservation Society (February, 2003)
   http://www.wdcs.org/dan/publishing.nsf/allweb/E57CE36F77FA443C802568F8004E1305
   
3. Global Register of Migratory Species (March, 2008)
   http://www.groms.de
   
4. MarineBio.org (March, 2008)
   http://marinebio.org/species.asp?id=337
   
5. Carwardine, M. (1995) Whales, dolphins and porpoises. Dorling Kindersley, London.
   
6. Animal Diversity Web (February, 2003)
   http://animaldiversity.ummz.umich.edu/accounts/inia/i._geoffrensis$narrative.html
   
7. Animal Info (February, 2003)
   http://www.animalinfo.org/species/cetacean/iniageof.htm
   
8. CMS species page (March, 2008)
   http://www.cms.int/reports/small_cetaceans/data/I_geoffrensis/I_geoffrensis.htm