DSC_3355 Rainbow trout (Oncorhynchus mykiss) female showing colour and pattern*
11004-07016 Rainbow trout (Oncorhynchus mykiss) a fly fisherman tries some early morning fishing at Lake Alexandrina in the Mackenzie Basin *
DSC_3286 'Blue' Rainbow trout (Oncorhynchus mykiss) genetic variants are extremely rare in wild rainbow trout, but they occasionally appear in hatchery raised fish. These may be either 'depigmented' (such as albino, or golden yellow), or 'blue' (either iridescent metallic blue, or cobalt blue). Such mutations are usually sterile in both sexes because of the lack of a large part of the pituitary gland. Ngongataha Hatchery *
