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Hardy small fish with vivid blue or neon colors. Used as pilot fish for tank cycling.
"Damselfish" covers the family Pomacentridae, small reef fish found in warm seas worldwide; several dozen species reach the ornamental trade, including the blue devil, yellowtail damsel and green chromis. Most adults are 5-10 cm, brightly coloured in blue, yellow or green, and live three to eight years. Their shared virtue is toughness: they shrug off water-quality swings and shipping stress and take prepared foods immediately, which is why they have long been used as pilot fish when cycling a tank. The trade-off is territoriality — many species become pugnacious with age and harass fish added later. If you plan a community, choose one of the milder chromis, add the damsel last, and rearrange the rockwork to reset territories.
Source: Wikipedia (CC BY-SA 4.0)
The Damselfish lives 3-8 years.
The Damselfish grows to 5-10cm.
Lifespan
3-8 years
Size
5-10cm
Temperature
23〜26℃
Artificial feed, Frozen food
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
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Some species are territorial, use caution
Cheap and hardy but some become aggressive with age
Most are small, 5–10cm as adults, and can live in small tanks. Leave room to rearrange the aquascape so territories can be reset.
Hardy fish that take prepared food right away and also eat frozen food. Food choice is rarely a problem.
Tolerant of water fluctuations and shipping stress, they have long been used as pilot fish when cycling a new tank.
Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.
The average lifespan of Damselfish is 3-8 years. With proper care and nutrition, they can live a long and healthy life.
Damselfish typically reaches 5-10cm as an adult. Size may vary depending on care conditions and individual genetics.
Damselfish feeds on: Artificial feed, Frozen food. Aim for a balanced diet with appropriate feeding frequency.
The price of Damselfish varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: June 13, 2026