Squirrelfish
Nocturnal reef fish of the subfamily Holocentrinae found in Atlantic and Indo-Pacific waters.
This group comprises forty known species within the family Holocentridae. They are active at night and inhabit tropical oceans across the Atlantic and Indo-Pacific regions.
- Contains forty recognized species and one proposed species.
- All members are nocturnal reef fish.
- Holocentrus is restricted to the Atlantic Ocean.
- Neoniphon and Sargocentron are from the Indo-Pacific.
- Featured in Ian Fleming's 1960 short story.
What it is
These fish belong to a specific subfamily containing forty recognized species plus one proposed candidate. They are commonly called squirrelfish and share a nocturnal lifestyle. The group includes three genera, with Holocentrus limited to the Atlantic Ocean. Other genera like Neoniphon and Sargocentron dominate the Indo-Pacific area. Some species extend into the Indian Ocean west of India. A fossil relative named Eoholocentrum dates back to the Early Eocene period in Italy.
Where it lives
Members occupy tropical marine environments across major ocean basins. The genus Holocentrus remains exclusive to the Atlantic Ocean. Species within Neoniphon and Sargocentron are widespread throughout the Indo-Pacific region. Several of these also appear in the Indian Ocean, specifically west of the southern tip of India. Their distribution covers coastal and reef habitats in warm waters.
How it lives
All members of this subfamily are nocturnal, meaning they are active during the night. This behaviour distinguishes them from many other reef fish. They inhabit tropical marine waters where they likely feed and move about after dark. Specific dietary habits and predator interactions are not detailed in the available records.
Fish and people
A rare example of these fish appears in Ian Fleming's 1960 James Bond short story titled The Hildebrand Rarity. This literary reference highlights their presence in popular culture beyond scientific study.
Status and threats
The conservation status and population trends for these fish are not assessed in the provided data.
Questions people ask about Squirrelfish
What are Holocentrinae commonly called?
They are typically known as squirrelfish. This name applies to all species within this subfamily due to their shared characteristics and nocturnal habits.
Where can you find these fish?
They live in the Atlantic Ocean and the Indo-Pacific region. Some species also occur in the Indian Ocean west of India. The genus Holocentrus is found only in the Atlantic.
Are these fish active during the day?
No, all members of this subfamily are nocturnal. They are active at night and rest during daylight hours.
Good reading and sources
The facts on this page come from the Wikipedia article "Holocentrinae", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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