A juvenile rainbow trout.
Rainbow trout that migrate to the ocean are commonly called steelhead trout. There are two forms of steelhead, summer and winter steelhead. Steelhead that return to spawning streams during the summer months with immature gonads are referred to as summer steelhead, whereas steelhead that return during the fall or winter months with fully mature gonads are called winter steelhead. Here is a photograph of a group of summer steelhead trout.
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