🔄 Both

Rainbow Trout

Oncorhynchus mykiss

One of the most beautiful and widely distributed fish in the world, the rainbow trout is named for the brilliant spectrum of colors along its side. Native to cold-water tributaries of the Pacific Ocean, it has been introduced worldwide for sport fishing and aquaculture. The sea-run form, called steelhead, migrates from the ocean to freshwater to spawn — one of nature's most remarkable journeys.

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Typical Size
12–30 inches (30–76 cm) typical; steelhead up to 45 inches (114 cm)
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Weight
1–8 lbs (0.45–3.6 kg) typical; steelhead up to 55 lbs (25 kg)
Lifespan
4–6 years for stream residents; steelhead up to 11 years
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Water Type
Fresh & Salt

🗺️ Habitat

Cold, clear streams, rivers, and lakes with high oxygen content. Steelhead form migrates to the Pacific Ocean and returns to freshwater to spawn.

🔍 How to Identify Rainbow Trout

  • 1Pink to red lateral stripe running from gills to tail
  • 2Black spots on body, fins, and tail
  • 3Blue-green or olive back fading to silver sides and white belly
  • 4Adipose fin (small fleshy fin between dorsal and tail fin)
  • 5Spots denser on the upper body and become larger toward the tail

🍽️ Diet

Insects, crustaceans, worms, small fish, and fish eggs

💡 Fun Facts About Rainbow Trout

  • Rainbow trout can jump up to 6 feet (1.8m) to clear waterfalls during upstream migration
  • Steelhead rainbow trout travel hundreds of miles from ocean to their birth streams to spawn
  • They are one of the most economically important aquaculture species in the world
  • Wild rainbow trout require pristine water quality — their presence indicates a healthy stream
  • The coloring intensifies dramatically during spawning season in males

🛡️ Conservation Status

Varies by population — some native populations are threatened while hatchery fish are abundant

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