
Source: Wikimedia Commons
Hemitaurichthys polylepis
A yellow-and-white butterflyfish with a dark head and a white triangle on the flank that gives the pyramid name. A plankton feeder that leaves corals alone, one of the few butterflyfish that can be kept in groups in a reef tank.
The Pyramid Butterflyfish (Hemitaurichthys polylepis) is a butterflyfish of the Pacific from Christmas Island in the eastern Indian Ocean to Indonesia, Hawaii, the Line Islands and Pitcairn, north to southern Japan. The head, dorsal and pelvic fins are dark brown to yellow, and the white flank meets the yellow-orange back in a triangular, pyramid-like outline; the anal fin is also yellow-orange. FishBase records a maximum of 18cm (total length); it forms large schools along steep outer reef slopes at 0-60m and feeds on plankton in open water away from the reef. It spawns in pairs. It is easy to keep: provide a tank of 470L or more with plenty of live rock for shelter. Shy at first, it soon feeds well on frozen foods containing algae, dried algae and vitamin-enriched brine and mysis shrimp. As a plankton feeder it does not harm corals or invertebrates, making it one of the few butterflyfish suitable for reef tanks. It is peaceful and can be kept singly, in pairs or in small groups.
Source: Wikipedia (CC BY-SA 4.0)
The Pyramid Butterflyfish lives 8-15 years.
The Pyramid Butterflyfish grows to Up to 18cm.
The ideal temperature for the Pyramid Butterflyfish is 22〜26℃.
Origin
Pacific Ocean (Christmas Island in the eastern Indian Ocean to Indonesia, Hawaii, the Line Islands and Pitcairn; north to southern Japan, south to New Caledonia)
Sources: LiveAquaria / FishBase
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.
Sources: CITES Appendices (species not listed) / IUCN Red List
Regulations may change. Always verify the latest information with the relevant authorities.
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Lifespan
8-15 years
Size
Up to 18cm
Temperature
22〜26℃
Frozen foods (mysis, brine shrimp), algae-based pellets, dried seaweed
Shy and hides after introduction; give it a calm setting. Watch for marine ich and quarantine first.
A tank of 470L or more is recommended, with plenty of live rock for shelter and open midwater swimming space.
22-26C, pH 8.1-8.4, specific gravity 1.020-1.025. Keep water stable.
A plankton feeder. Offer vitamin-enriched brine and mysis shrimp, algae-containing frozen foods, pellets and dried algae several times a day.
Peaceful; can be kept singly, in pairs or in small groups. Does not harm corals or invertebrates, so suits reef tanks.
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 Pyramid Butterflyfish is 22〜26℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Pyramid Butterflyfish is 8-15 years. With proper care and nutrition, they can live a long and healthy life.
Pyramid Butterflyfish typically reaches Up to 18cm as an adult. Size may vary depending on care conditions and individual genetics.
Pyramid Butterflyfish feeds on: Frozen foods (mysis, brine shrimp), algae-based pellets, dried seaweed. Aim for a balanced diet with appropriate feeding frequency.
The price of Pyramid Butterflyfish varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 17, 2026