Family Iniidae - Boto (1 species in 1 genus)
The single species in this family, the boto of the Amazon and Orinoco drainages in South America, is unique in several ways. It is a very large river dolphin, with a moderately long, thick snout dotted with sparse hairs. The dorsal ridge is very low and usually indistinct. Many adults are nearly totally pink in colour. The rear teeth are flattened and the zygomatic arches of the skull are incomplete.
Genus Inia containing 1 species:
Inia geoffrensis (Boto)