Anoa, also known as dwarf buffalo and sapiutan, are two species of the genus Bubalus, placed within the subgenus Anoa and endemic to the island of Sulawesi in Indonesia: the mountain anoa (Bubalus quarlesi) and the lowland anoa (Bubalus depressicornis). Both live in undisturbed rainforests and are similar in appearance to miniature water buffaloes, weighing 150–300 kg (330–660 lb). 'Anoa' itself is Celebic in origin cognate to words in other related Philippine languages in the same Austronesian family that name the common water buffalo (anwáng in Tagalog, nuáng in Ilocano, nuwang in Ifugaw etc.).
Both species of anoa have been classified as endangered since the 1960s and the populations continue to decrease. Fewer than 5,000 animals of each species likely remain. Reasons for their decline include poaching for hides, horns, and meat by the local peoples and loss of habitat due to the advancement of settlement. Currently, poaching is the most serious factor in most areas.