A large, partly migratory trout native to the Pacific seaboard of North America. It has been widely introduced elsewhere, both as a farmed food fish and as a sporting fish.
- Onchorhynchus mykiss, family Salmonidae.
- I have even heard stories of captures of the migratory form of the rainbow trout, the steelhead, having been caught from rivers in the North West of England.
- Intensive aquaculture of rainbow trout and other salmonids is a relatively new innovation, compared to the cultivation of most other animals.
- Today's anglers fishing for rainbow trout carry several boxes of fly patterns, but only use a dozen flies.
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