
Source: Wikimedia Commons
Chaetodon semilarvatus
A bright yellow Red Sea butterflyfish with thin orange-red vertical lines and a blue-grey patch behind the eye, known for hovering motionless under table corals.
The golden or bluecheek butterflyfish (Chaetodon semilarvatus) occurs only in the Red Sea and Gulf of Aden (FishBase). At up to 23 cm TL it is large for a butterflyfish. It is bright yellow with thin orange-red vertical lines and a blue-grey patch behind the eye. It lives on shallow, coral-rich reefs in pairs or small groups and sometimes hovers motionless for long periods under the plates of Acropora table corals. In the wild it eats hard and soft corals and benthic invertebrates. Saltcorner notes that juveniles adapt to aquaria more easily and adults can be difficult to wean. Feed meaty frozen foods such as brine shrimp and mysis plus algae-based foods several times a day. It eats stony and soft corals, clams and tubeworms, so keep it in a spacious fish-only tank rather than a reef. It is a popular Red Sea species in Japanese specialist shops.
Source: Wikipedia (CC BY-SA 4.0)
The Bluecheek butterflyfish grows to Up to 23 cm TL (FishBase).
The ideal temperature for the Bluecheek butterflyfish is 22〜28℃.
Origin
Red Sea and Gulf of Aden
Lifespan
Little data available
Size
Up to 23 cm TL (FishBase)
Temperature
Sources: FishBase (Chaetodon semilarvatus) / Saltcorner Fish Library (Bob Goemans)
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.
Not listed in the CITES Appendices (checked on Species+). Not designated as an Invasive Alien Species under Japanese law. Never release aquarium animals into the sea.
Sources: Species+ (CITES) / Ministry of the Environment: List of Designated Invasive Alien Species / FishBase
Regulations may change. Always verify the latest information with the relevant authorities.
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22〜28℃
Omnivore (corals, benthic invertebrates, algae)
22-28°C, specific gravity 1.020-1.026 (Saltcorner).
About 470 L (125 gallons) or more, a fish-only tank with open swimming space and live rock to browse.
Keep with peaceful fish.
It eats stony and soft corals, clams and tubeworms, so it is not reef-safe.
Feed meaty frozen foods such as brine shrimp and mysis several times a day, plus spirulina or nori-based foods. Adults can be hard to wean; opened clams sometimes get them started.
Juveniles adapt more readily. Confirm it is eating frozen food before buying.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Bluecheek butterflyfish is 22〜28℃. Avoid sudden temperature changes and maintain a stable environment.
Bluecheek butterflyfish typically reaches Up to 23 cm TL (FishBase) as an adult. Size may vary depending on care conditions and individual genetics.
Bluecheek butterflyfish feeds on: Omnivore (corals, benthic invertebrates, algae). Aim for a balanced diet with appropriate feeding frequency.
The price of Bluecheek butterflyfish varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 23, 2026