The houndfish (Tylosurus crocodilus) is a game fish of the family Belonidae. It is the largest member of its family, growing up to 5 feet (1.5 m) in length and 10 pounds (4.5 kg) in weight. It is also often called the crocodile needlefish.

COMMON NAMES: Houndfish, Crocodile Needlefish, Crocodile Longtom, Crocodilian Longtom; German Riesen-Hornhecht; French Orphie Crocodile TRADITIONAL NAMES: ‘Aku (RR MG), Akuaku < Aku (AT), Aku (MK MT TS TW), Taravana (AK), Haku (MH), Aku / Aku-pā? (PK); Other Polynesian - Aavere (TAH), Aurepe (TAH-L), Eakupapa (TUA), Au (MQA), Kokoua (MVA)