'white fish' definitions:

Definition of 'white fish'

From: GCIDE

Beluga \Be*lu"ga\ (b[-e]*l[=u]"g[.a]), n. [Russ. bieluga a sort of large sturgeon, prop. white fish, fr. bieluii white. The whale is now commonly called bieluka in Russian.]
1. (Zool.) A cetacean allied to the dolphins. [1913 Webster]
Note: The northern beluga (Delphinapterus catodon) is the white whale and white fish of the whalers. It grows to be from twelve to eighteen feet long. [1913 Webster]
2. the sturgeon (Huso huso) native to the Black Sea and Caspian Sea; -- also called hausen. It is valued for its roe, sold as caviar, and is also used for production of isinglass. See also sturgeon. [PJC]
3. the caviar obtained from the beluga[2]; -- also called beluga caviar. The caviar of the beluga is considered the finest sort, larger and of a taste superior to that obtained from other sturgeon. See also sturgeon and caviar. [PJC]