
Source: Wikimedia Commons
Rhinecanthus aculeatus
A trigger named for the painter because of its bold pattern. Hardy and easy to feed, but it reaches 30cm, is territorial and eats invertebrates, so it is not for reef tanks.
The Picasso Triggerfish (Rhinecanthus aculeatus) is a balistid found from East Africa to Hawaii and the Marquesas and north to southern Japan. It is common on shallow reef flats and lagoons down to 50m; juveniles hide in rubble while adults swim in the open. Its pale body with dark oblique bands, blue-and-black head stripes and a yellow line joining the cheeks gave it the painter's name. It eats almost anything from algae to molluscs, crustaceans, urchins and small fish and defends its territory fiercely. It sleeps lying on its side and grunts when alarmed. Maximum 30cm. Keep at 22-26C, pH 8.1-8.4 and SG 1.020-1.025 in a tank of 680L or more; it will rearrange rockwork. Offer hard foods such as shell-on shrimp and clams to wear down its ever-growing teeth. A hardy, easy-feeding beginner trigger, but it eats invertebrates and fights its own kind, so keep one with large fish. IUCN: Least Concern.
Source: Wikipedia (CC BY-SA 4.0)
The Picasso Triggerfish grows to Up to 30cm.
The ideal temperature for the Picasso Triggerfish is 22〜26℃.
Origin
Indo-Pacific (East Africa to Hawaii and the Marquesas, north to southern Japan)
Size
Up to 30cm
Temperature
22〜26℃
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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Frozen krill, clams, shell-on shrimp, squid, small fish
Strongly territorial and rearranges rockwork. It may bite hands placed in the tank.
680L or more with rock caves and a secure lid. Keep heaters and pumps out of reach of its teeth.
22-26C, pH 8.1-8.4, SG 1.020-1.025. Hardy and fairly tolerant of change.
Rotate krill, clams, shell-on shrimp, squid and small fish; include hard foods for its growing teeth.
Eats shrimp, crabs, snails and urchins. Fights other triggers, so keep one, with large angels, tangs, groupers or morays.
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 Picasso Triggerfish is 22〜26℃. Avoid sudden temperature changes and maintain a stable environment.
Picasso Triggerfish typically reaches Up to 30cm as an adult. Size may vary depending on care conditions and individual genetics.
Picasso Triggerfish feeds on: Frozen krill, clams, shell-on shrimp, squid, small fish. Aim for a balanced diet with appropriate feeding frequency.
The price of Picasso Triggerfish varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 15, 2026