Family: Salmonidae
Amago — a Salmonidae from Japan, territorial toward its own kind; predatory on small fish. Reaches 15–25 cm; solitary or small groups; juveniles shoal. 8–18 °C.
Oncorhynchus masou ishikawae, a member of the family Salmonidae, comes from Japan, where it inhabits cold, highly oxygenated mountain streams. Territorial toward its own kind; predatory on small fish and carnivore; insects, crustaceans and small fish, it grows to 15–25 cm and adapts well to a properly set-up aquarium in the 8–18 °C range. Other Oncorhynchus species in our database include Oncorhynchus masou.
Difficulty: moderate. Territorial toward its own kind; predatory on small fish. Solitary or small groups; juveniles shoal.
Aim for 8–18 °C. Chiller or cold-water management in summer; 8–18 °C curated husbandry range.
Adults reach 15–25 cm; it is bottom to mid-water in runs and pools. Plan for at least 300 litres.
Carnivore; insects, crustaceans and small fish. Vary the menu — quality flakes or pellets plus frozen or live foods.
Yes, with care. Territorial toward its own kind; predatory on small fish — pair it with Similar-sized peaceful community fish — Similar size and water needs and skip Much smaller fish — May outcompete or bully tiny tankmates.
Its home waters are Japan — cold, highly oxygenated mountain streams, with strong current over gravel.
A confirmed jumper: fit a tight lid and lower the waterline slightly.
Autumn redd spawner in flowing gravel. Males develop kype and brighter colours at spawning.