Biology: Tarpon

At up to 8 feet (2.5 m) long a tarpon is a pretty good catch and is a common sport fish. Some can weight up to 350 lb (160 kg). Tarpon are prized by anglers for their leaping, head-shaking fight. However, they have little to no food value and are normally released unharmed.

Tarpons are silvery fish with large scales. These scales are sometimes used for ornamental purposes. They live close inshore and often enter estuaries, lagoons and rivers. When they enter stagnant water they gulp air which enters their swim bladder which then acts as a lung.

Tarpon typically spawn in the ocean. A female tarpon will produce over 12 million eggs but there is a high mortality rate. The larvae drift into estuaries and have been found in pools and lakes that have been temporarily cut of from the sea.

Sources:
Wikipedia
(Book) Ocean by The American Museum of Natural History.