Marine life  /  Groupers & anthias  /  Honeycomb grouper
Reviewed 2026-09-06
Species entry

Honeycomb grouper

Epinephelus merra

A small grouper covered in close-packed dark hexagons; one of the commonest fish on rubble.

Size
To 31 cm
Depth
1–30 m
Habitat
Rubble, coral heads and reef flats
Active
Daylight
Range
Indo-Pacific
Rarity
Lembeh Strait
1 star of 5, found on most dives
SP-01
honeycomb grouper · full body · habitat
4:3 · min 2400px

To about 31 cm, pale cream covered in close-packed dark brown hexagonal spots separated by narrow pale lines, giving the honeycomb effect, with the spots merging into short bars on the lower body. Several small Epinephelus share this ground and pattern; the tight, evenly sized hexagons and the absence of pale spots between them place this one, though a photograph is often needed.

It rests on rubble and dead coral in shallow water and takes small fish and crustaceans in short ambushes. It is among the most numerous groupers here and is easy to approach — it holds position until a diver is well inside a metre and then moves a short distance and settles again. Recorded from about 1 to 30 m.

Where to find:

LocationRarity Best monthsDepthHabitat
Lembeh Strait Indonesia editorial estimate
1 star of 5, found on most dives
Year-round
1–30 m
Rubble, coral heads and reef flats
Bali Indonesia editorial estimate
1 star of 5, found on most dives
Year-round
1–30 m
Rubble and reef slopes
Anilao Philippines editorial estimate
1 star of 5, found on most dives
Year-round
1–30 m
Rubble and coral reef
Dauin & Dumaguete Philippines editorial estimate
1 star of 5, found on most dives
Year-round
1–25 m
Rubble and reef edges
Papua New Guinea Papua New Guinea editorial estimate
1 star of 5, found on most dives
Year-round
1–30 m
Coral reef and rubble

Ratings are per location: 1 means found on most dives that look for it, 5 means a handful of records. Where enough dives have been logged the figure is calculated from them; otherwise it is an editorial estimate, and says so. We publish habitat and destination, not the dive site.

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