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Birdwire rockcod (Epinephelus merra) — Serranidae

Birdwire rockcod

Epinephelus merra
Family: Serranidae
LC · Least Concern

The Birdwire rockcod (Epinephelus merra) is a saltwater fish of the family Serranidae that grows up to 37 cm.

Length
36.5 cm
Water
Saltwater
Depth
0.0–50.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Diurnal
Body shape
Torpedo-shaped
Substrate
Stone or rock
Danger
Venomous / poisonous
Range
Indian and Pacific Ocean, from the Red Sea and East Africa to Polynesia.
Edibility
Commonly eaten

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Description

The honeycomb grouper is a small grouper (family Serranidae) of the Indian and Pacific Oceans. The species grows to about 37 cm and has a pale body almost entirely covered with densely set, angular brown spots resembling a honeycomb. It lives solitarily on coastal and offshore reefs, usually shallower than 20 metres; juveniles shelter among branching staghorn coral. As an ambush predator it feeds on small fishes and crustaceans. Like many groupers it begins life as a female and can later change into a male. There are reports of ciguatera poisoning after consumption.

Frequently asked questions

How do you recognise the Birdwire rockcod?

The Birdwire rockcod has a torpedo-shaped body, is mainly brown and shows a spots pattern. Honeycomb pattern of angular brown blotches; changes from female into male. Note: in tropical areas this species can cause ciguatera poisoning when eaten; large specimens of coral reef predators can accumulate the toxin. Eat with care or avoid in risk areas.

Where does the Birdwire rockcod live?

The Birdwire rockcod lives in the sea (marine waters) and is mostly found around stony or rocky ground. Indian and Pacific Ocean, from the Red Sea and East Africa to Polynesia.

How big does the Birdwire rockcod get?

The Birdwire rockcod grows to a maximum of about 37 cm.

Is the Birdwire rockcod dangerous to humans?

The Birdwire rockcod is venomous — handle spines with care and seek medical help after a sting if needed. If symptoms of ciguatera poisoning appear after eating, seek medical help. There is no specific antidote; treatment is supportive.

Is the Birdwire rockcod edible?

Yes, the Birdwire rockcod is commonly eaten.

More photos

Birdwire rockcod (Epinephelus merra) — Serranidae — 2
iNaturalist ((c) Vince Golder, some rights reserved (CC BY-NC))
Birdwire rockcod (Epinephelus merra) — Serranidae — 3
iNaturalist ((c) Attila Oláh, some rights reserved (CC BY))
Birdwire rockcod (Epinephelus merra) — Serranidae — 4
Wikimedia Commons — Rore bzh (CC BY-SA 3.0)
Birdwire rockcod (Epinephelus merra) — Serranidae — 5
iNaturalist ((c) Ashton Williams, some rights reserved (CC BY-NC-SA))
Fin

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All data

Identification

English name
Birdwire rockcod verified
Scientific name
Epinephelus merra
Family
Serranidae
Other names
Black-spotted rock-cod; Common birdwire rockcod; Coral cod; Dwarf spotter grouper; Dwarf spotted grouper; Honeycomb grouper; Honeycomb cod; Dwarf spotted rockcod; Honeycomb rockcod; Honeycomb rock-cod; Dwarf-spotted rockcod; Honeycomb rock cod verified

Appearance

Size class
Medium verified
Max length (cm)
36.5 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Brown inferred
Pattern
Spots inferred
Tail shape
Rounded inferred
Mouth position
Terminal inferred
Lips
Thin inferred
Barbels
No sourced
Dorsal fins
One continuous inferred
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Saltwater sourced
Substrate
Stone or rock sourced
Min depth (m)
0.0 verified
Max depth (m)
50.0 verified
Natural range
Indian and Pacific Ocean, from the Red Sea and East Africa to Polynesia. inferred
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Diet (detail)
Small fishes and crustaceans sourced
Social behaviour
Solitary inferred
Territorial
Yes inferred
Activity
Diurnal inferred
Reproduction
Protogynous (female first) sourced
Sexual dimorphism
No inferred
Seasonality
Spawns in the warm months, often in small spawning groups, with pelagic eggs. inferred
Special features
Honeycomb pattern of angular brown blotches; changes from female into male. Note: in tropical areas this species can cause ciguatera poisoning when eaten; large specimens of coral reef predators can accumulate the toxin. Eat with care or avoid in risk areas. verified

For anglers

Edibility
Commonly eaten sourced
Fishing method
Fishing with natural bait (fish, shrimp, worm) or lures close to reef and rock structures. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Venomous / poisonous sourced
First aid
If symptoms of ciguatera poisoning appear after eating, seek medical help. There is no specific antidote; treatment is supportive. sourced

Status & sources

Sources
FishBase via GBIF (DwC-A), CC-BY-NC 4.0

Same genus Epinephelus

More from the family Serranidae

Fin

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