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Chrysiptera parasema
Damselfish with vivid blue body and beautiful yellow tail fin. Hardy, eats prepared food well, and is one of the best species for saltwater fish beginners. Can be kept in small tanks.
Yellowtail Blue Damselfish (Chrysiptera parasema) is a small damselfish widely distributed in the western Pacific Ocean. Characterized by beautiful coloring of vivid blue body with yellow tail fin. Very hardy and eats prepared food well, long cherished as one of the best species for beginning saltwater fish keeping.
Origin
Western Pacific Ocean (Philippines to Australia)
Lifespan
3-5 years
Size
5-7cm
Temperature
24〜27℃
Pellets, frozen foods, algae
Specific gravity 1.023-1.025
Maintain 24-26°C
Territorial, best kept alone or in small numbers
Hardy beginner species that tolerates water changes
Sources: LiveAquaria
Edited & verified by: br-choku editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Sources: CITES Appendices (species not listed) / 環境省 特定動物リスト / 環境省 特定外来生物等一覧
Regulations may change. Always verify the latest information with the relevant authorities.
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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 ideal temperature for Yellowtail Blue Damselfish is 24〜27℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Yellowtail Blue Damselfish is 3-5 years. With proper care and nutrition, they can live a long and healthy life.
Yellowtail Blue Damselfish typically reaches 5-7cm as an adult. Size may vary depending on care conditions and individual genetics.
Yellowtail Blue Damselfish feeds on: Pellets, frozen foods, algae. Aim for a balanced diet with appropriate feeding frequency.
The price of Yellowtail Blue Damselfish varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: June 23, 2026