
Source: Wikimedia Commons
Emperor angelfish
Large angelfish with dramatically different juvenile and adult patterns. Blue and yellow stripes are stunning. Requires large tank.
The emperor angelfish (Pomacanthus imperator) is a large marine angelfish of the family Pomacanthidae found broadly across the Indian and Pacific Oceans, from the Red Sea to Hawaii and the Austral Islands. Its most captivating attribute is a dramatic ontogenetic color change: juveniles display swirling white and blue concentric patterns on a dark background, while adults develop brilliant alternating horizontal stripes of electric blue and golden yellow. Adults can reach 40 cm in length, making a tank of 500 litres or more an absolute requirement. Care is demanding — maintaining pristine water quality and providing ample swimming room are critical, and transitioning individuals onto prepared foods can require considerable patience. Universally regarded as the 'king of marine fish', it is among the most coveted species by aquarists worldwide.
Source: Wikipedia (CC BY-SA 4.0)
Origin
Indian and Pacific Oceans, from the Red Sea to Hawaii and the Austral Islands
Lifespan
10-20 years
Size
30-40cm
Temperature
23〜26℃
Pellets, frozen food, algae, sponge
500L+ large tank essential
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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Stable water quality required
Omnivorous. Feed varied diet including sponge-based food
Pattern changes dramatically as it matures
Eats corals — suited for fish-only tanks
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The ideal temperature for Emperor Angelfish is 23〜26℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Emperor Angelfish is 10-20 years. With proper care and nutrition, they can live a long and healthy life.
Emperor Angelfish typically reaches 30-40cm as an adult. Size may vary depending on care conditions and individual genetics.
Emperor Angelfish feeds on: Pellets, frozen food, algae, sponge. Aim for a balanced diet with appropriate feeding frequency.
The price of Emperor Angelfish varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: June 23, 2026