What is "bull trout"

Huch \Huch\, Huchen \Hu"chen\, n. [G.] (Zo["o]l.) A large salmon ( Salmo hucho or Salvelinus hucho) inhabiting the Danube; -- called also huso, and bull trout.

malma \mal"ma\, n. (Zo["o]l.) A spotted trout ( Salvelinus malma), inhabiting Northern America, west of the Rocky Mountains; -- called also Dolly Varden trout, bull trout, red-spotted trout, and golet.

Dolly Varden \Dol"ly Var"den\

1. A character in Dickens's novel ``Barnaby Rudge,'' a beautiful, lively, and coquettish girl who wore a cherry-colored mantle and cherry-colored ribbons.

2. A style of light, bright-figured dress goods for women; also, a style of dress.

   Dolly Varden trout (Zo["o]l.), a trout of northwest America; -- called also bull trout, malma, and red-spotted trout. See Malma.

The bull trout (Salvelinus confluentus) is a char of the family Salmonidae native to northwestern North America. Historically, S. confluentus has been known as the " Dolly Varden" (S. malma), but was reclassified as a separate species in 1980. Bull trout are listed as a threatened species under the U.S. Endangered Species Act (1998) and as vulnerable on the IUCN Red List of Threatened Species.