Fish that exist solely in fresh water spawn in the spring. Most males spawn at 1 year, while females may take 6 years to mature. Rainbow Trout are much-sought game fish. They provide good eating and are raised for market through aquaculture.
Description: To 3’9″ (1.1 m); 42 1/8 lbs (19.1 kg). Elongate, fusiform. Marine coloration: metallic-blue above, silvery-white below, with small, black spots on back, sides, and dorsal and caudal fins. Freshwater coloration: spots more prominent, distinctive red band on sides. Mouth white; no teeth on back of tongue. 8-12 anal fin rays; adipose fin present, usually with black edge.
The Brown Trout, native to Europe and western Asia, was introduced into the United States 100 years ago and is presently one of the most widespread salmonids. It can tolerate higher temperatures than the other salmons and trouts. The young feed on aquatic insects; adults feed to a large extent on other fishes. Brown Trout are difficult to catch, and as food they are not as highly regarded as Brook or Rainbow trout.
Description: To 3’4″ (1 m); 39 1/4 lbs (17.8 kg). Elongate, fusiform, moderately compressed; back and sides olive, becoming lighter, belly silvery, numerous red or orange spots, often with halo, scattered on head, body, and dorsal and adipose fins; maxilla reaches well past eye. Pectoral fin inserted well below axis of body; dorsal fin base short, about midway between snout and caudal fin base; adipose fin present; caudal fin truncate.