> sturgeon

from the World Book:
Quote:

One of the best-known sturgeon is the common sturgeon, which lives in European waters. A related species, the Atlantic sturgeon, lives along the North American coast from Labrador to the Gulf of Mexico. The white sturgeon of the American Pacific Coast is the largest American fish of this group. It grows to 20 feet (6 meters) long and may weigh more than 1,000 pounds (448 kilograms). The lake sturgeon lives in the Great Lakes and the Mississippi Valley waters.
Scientists consider the beluga to be the largest freshwater fish. It lives in the Black and Caspian seas. The largest known beluga measured 28 feet (8.5 meters) in length and weighed 2,860 pounds (1,297 kilograms). The beluga produces most European caviar. North American sturgeons were abundant once, but overfishing, dams, and pollution have greatly reduced their number.



you may be thinking of the (more World Book)
Quote:

Coelacanth, pronounced SEE luh kanth, is a primitive type of fish found in the Indian Ocean. Some coelacanth fossils date from more than 300 million years ago. Scientists believed these fish had been extinct for 80 million years until a coelacanth was caught off the coast of South Africa in 1938. Since then, many more coelacanths have been caught. Coelacanths are members of an ancient group of fishes known as sarcopterygians.



I like it, too.

formerly known as etaoin...