Family: Plecoglossidae
Ayu sweetfish — a Plecoglossidae from China and Japan, calm, undemanding and well-suited to community life. Reaches 52.5–77 cm; small groups recommended. 20–26 °C.
Plecoglossus altivelis, a member of the family Plecoglossidae, comes from China and Japan, where it inhabits warm freshwater streams and lakes. Calm, undemanding and well-suited to community life and unfussy omnivore; varied diet keeps condition, it grows to 52.5–77 cm and adapts well to a properly set-up aquarium in the 20–26 °C range. In a community tank it pairs well with Robust schooling cyprinids.
A moderate-level species: calm, undemanding and well-suited to community life; stable water matters more than fancy equipment.
Aim for 20–26 °C. Stable temperature matching the species origin; 20–26 °C general community range.
Full size is 52.5–77 cm. Minimum tank: 500 L, with open swimming space along its middle of the water column habits.
Unfussy omnivore; varied diet keeps condition. It forages naturally over fine sand and gravel, so let some food reach the bottom.
Calm, undemanding and well-suited to community life; small groups recommended. Good company: Robust schooling cyprinids — Add activity without conflict. Keep away from Much larger predators — Risk at night.
Native to China and Japan, where it lives in warm freshwater streams and lakes. Still to gentle current; Moderate oxygen levels.
Low escape risk, but a lid is cheap insurance.
Spawns freely; remove parents to save the eggs. Subtle external differences.