Wahoo

The wahoo (Acanthocybium solandri) is a scombrid fish found worldwide in tropical and subtropical seas. It is best known to sports fishermen, as its speed and high-quality flesh makes it a prized and valued game fish. In Hawaii, the wahoo is known as ono." The species is sometimes called hoo" in the United States.
Other uses.
Wahoo - another term for yahoo.
Origin.
The origin of "wahoo" was in the 1940s. It is probably a natural exclamation.
External links.
Wahoo on English Wikipedia