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Dick bride-groom fish (Monocentris japonica) — Monocentridae

Dick bride-groom fish

Monocentris japonica
Family: Monocentridae
LC · Least Concern

The Dick bride-groom fish (Monocentris japonica) is a saltwater fish of the family Monocentridae that grows up to 17 cm.

Length
17 cm
Water
Saltwater
Depth
1.0–300.0 m
Diet
Carnivore
Behaviour
Small groups
Body shape
Flat / disc-shaped
Substrate
Stone or rock
Danger
Harmless
Range
Indo-Pacific; sublittoral rocky reefs, under ledges and in caves.
Edibility
Not eaten

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Description

The pinecone fish is a remarkable reef fish of the pineconefish family (Monocentridae) from the Indo-Pacific. The species grows to about 17 cm and has a stocky, yellowish body armoured with large, black-edged, plate-like scales, making it resemble a pinecone. On the lower jaw it bears a pair of light organs housing luminous bacteria, used to hunt in the dark. It lives in the sublittoral zone, under ledges and in caves of rocky reefs, and forms schools. It feeds on small crustaceans. The stout fin spines can prick, but the species is otherwise harmless to humans.

Frequently asked questions

How do you recognise the Dick bride-groom fish?

The Dick bride-groom fish has a flattened, disc-shaped body, is mainly yellow-gold and shows a marbled pattern. Armoured with pine cone-like plate scales; light organs with luminous bacteria on the lower jaw.

Where does the Dick bride-groom fish live?

The Dick bride-groom fish lives in the sea (marine waters) and is mostly found around stony or rocky ground. Indo-Pacific; sublittoral rocky reefs, under ledges and in caves.

How big does the Dick bride-groom fish get?

The Dick bride-groom fish grows to a maximum of about 17 cm. On average the species is around 12 cm.

Is the Dick bride-groom fish dangerous to humans?

No, the Dick bride-groom fish is harmless to humans. None required: this species is harmless to humans.

Is the Dick bride-groom fish edible?

The Dick bride-groom fish is not usually eaten.

More photos

Dick bride-groom fish (Monocentris japonica) — Monocentridae — 2
Bell Museum, University of Minnesota (CC0 1.0) via GBIF — JFBM
Dick bride-groom fish (Monocentris japonica) — Monocentridae — 3
iNaturalist ((c) paritutu_beach_combe, some rights reserved (CC BY-NC))
Dick bride-groom fish (Monocentris japonica) — Monocentridae — 4
Wikimedia Commons — Amada44 (CC BY 3.0)
Dick bride-groom fish (Monocentris japonica) — Monocentridae — 5
iNaturalist ((c) Georgina Jones, some rights reserved (CC BY-SA))
Fin

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All data

Identification

English name
Dick bride-groom fish verified
Scientific name
Monocentris japonica
Family
Monocentridae
Other names
Japanese pineapplefish; Knight fish; Knightfish; Pine sculpin; Pineapple fish; Pineconefish; Pineapplefish; Pinecone fish; Soldierfish verified

Appearance

Size class
Medium verified
Max length (cm)
17.0 verified
Average length (cm)
12.0 verified
Body shape
Flat / disc-shaped sourced
Dominant colour
Yellow / gold inferred
Pattern
Marbled inferred
Tail shape
Forked inferred
Mouth position
Terminal inferred
Lips
Thin inferred
Barbels
No sourced
Dorsal fins
Two separate inferred
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Saltwater sourced
Substrate
Stone or rock sourced
Min depth (m)
1.0 verified
Max depth (m)
300.0 verified
Natural range
Indo-Pacific; sublittoral rocky reefs, under ledges and in caves. inferred
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Diet (detail)
Small crustaceans sourced
Social behaviour
Small groups inferred
Territorial
No inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Armoured with pine cone-like plate scales; light organs with luminous bacteria on the lower jaw. sourced

For anglers

Edibility
Not 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
Harmless sourced
First aid
None required: this species is harmless to humans. sourced

Status & sources

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

More from the family Monocentridae

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