Thick fish steaks are also known as

Viscera

Fillets

Fins

Darnes

Thick fish steaks are also known as fillets

Explanation:

Filets do not contain any bits of the more prominent bones, yet a few species have littler, intramuscular bones (called pins) inside the tissue.

A fish filet, from the French word filet, which means a string or strip, is the substance of a fish that has been removed or cut from the bone by cutting the long way along one side of the fish parallel to the spine. In anticipation of filleting, any scales on the fish ought to be expelled.