Anguilla mauritiana; Print; The mottled eel (Anguilla bengalensis); also known as the African mottled eel; the Indian longfin eel; the Indian mottled eel; the long-finned eel or the river eel; is a demersal; catadromous eel in the family Anguillidae. It was described by John McClelland in 1844. It is a tropical; freshwater eel which is known from East Africa; Bangladesh; Andaman Islands; Mozambique; Malawi; Sri Lanka; Sumatra; and Indonesia and recently from Madagascar. The eels spend most of their lives in freshwater at a depth range of 3-10 metres; but migrate to the Indian Ocean to breed. Males can reach a maximum total length of 121 centimetres and a maximum weight of 7; 000 grams. The eels feed primarily off of benthic crustaceans; mollusks; finfish and worms.; 1864