Brown Trout (Salmo trutta)
Overview
The Brown Trout is a powerful, cold-water predatory fish admired for its olive-brown body with dark and red spotting. Highly active and fast-growing, it is best suited to large, cool-water systems, ponds, or specialist aquaculture setups rather than typical home aquariums.
Origin
Europe and Western Asia
(Introduced worldwide for sport fishing and aquaculture)
Feeding
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Carnivorous
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Feeds on insects, crustaceans, small fish, and invertebrates
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In captivity: sinking carnivore pellets, frozen foods, and live prey
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Requires high-quality, protein-rich food
Tank Mates
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Not suitable for community aquariums
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Will eat smaller fish
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Best kept alone or with similarly sized cold-water species in very large systems
Aggression
Moderate to high
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Territorial and predatory
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Aggression increases in confined spaces
Experience Level
Advanced
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Requires excellent water quality, strong filtration, and high oxygen levels
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Not recommended for standard home aquariums
Water Parameters
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Temperature: 8–16°C (46–61°F)
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pH: 6.5–8.0
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Hardness: Soft to moderately hard
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Oxygen: Very high (strong flow and aeration essential)
Notes
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Requires large tanks, raceways, or outdoor ponds
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Sensitive to poor water quality and warm temperatures
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Ideal for specialist cold-water and aquaculture enthusiasts
A stunning and iconic cold-water species best suited to experienced keepers with the space and equipment to meet its demanding care requirements.