Ocean trout is the Australian market name for large rainbow trout (Oncorhynchus mykiss) raised in marine or estuarine environments. It has rich, pink-orange flesh with a higher fat content than Atlantic salmon, giving it a buttery texture and pronounced flavour. The flesh colour comes from astaxanthin in the feed, the same pigment found in wild salmon diets.
Ocean trout is primarily an Australian and New Zealand product. The name distinguishes farmed, sea-raised trout from the smaller freshwater rainbow trout. It has become a popular alternative to Atlantic salmon in Australian restaurants and fishmongers, valued for its richness in sashimi, smoking, and grilling.
The species is the same as rainbow trout found worldwide, but the marine farming environment and larger harvest size give it characteristics more similar to salmon than to the freshwater trout most people picture.
How it's produced
Ocean trout is farmed in sea cages (net pens) in cool, clean marine waters. In Australia, the main production region is Tasmania, particularly Macquarie Harbour and the waters around the southeast coast. The fish start as eggs in freshwater hatcheries, are raised as juveniles in freshwater tanks, then transferred to sea cages where they grow to harvest size over 18 to 24 months.
The fish are fed manufactured pellets containing fishmeal, fish oil, plant proteins, and added pigment. As with all salmonid aquaculture, environmental management is a focus — including managing waste, sea lice, and interactions with wild marine life. Australian ocean trout farming is regulated under state and federal environmental guidelines.
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