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Emperor (Gymnocranius elongatus) — Lethrinidae

Emperor

Gymnocranius elongatus
Family: Lethrinidae
LC · Least Concern

The Emperor (Gymnocranius elongatus) is a saltwater fish of the family Lethrinidae that grows up to 35 cm.

Length
35 cm
Water
Saltwater
Depth
50.0–100.0 m
Diet
Carnivore
Behaviour
Small groups
Activity
Diurnal
Body shape
Torpedo-shaped
Substrate
Sand / mud bottom
Danger
Harmless
Range
Indo-West Pacific, on sandy or low-relief rocky bottoms, often on offshore grounds.
Edibility
Rarely eaten

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Description

The forktail large-eye bream is an emperor (family Lethrinidae) of Indo-West Pacific waters. The species grows to about 35 cm and has a fusiform, silvery body with large eyes and a deeply forked tail. It lives demersally on sandy or low-relief rocky bottoms, often on offshore trawling grounds and sometimes near shallow coral reefs, alone or in small groups. Its diet consists of bottom-living invertebrates. The species is harmless to humans and of modest commercial value, marketed fresh.

Frequently asked questions

How do you recognise the Emperor?

The Emperor has a torpedo-shaped body, is mainly silver-grey and shows a plain pattern. Large eyes and a deeply forked tail; lives on offshore sandy grounds.

Where does the Emperor live?

The Emperor lives in the sea (marine waters) and is mostly found around sand or mud bottom. Indo-West Pacific, on sandy or low-relief rocky bottoms, often on offshore grounds.

How big does the Emperor get?

The Emperor grows to a maximum of about 35 cm. On average the species is around 25 cm.

Is the Emperor dangerous to humans?

No, the Emperor is harmless to humans. None required: this species is harmless to humans.

Is the Emperor edible?

The Emperor is rarely eaten.

More photos

Emperor (Gymnocranius elongatus) — Lethrinidae — 2
Williams, Jeffrey T. (CC0 1.0) via GBIF — USNM
Emperor (Gymnocranius elongatus) — Lethrinidae — 3
Williams, Jeffrey T. (CC0 1.0) via GBIF — USNM
Emperor (Gymnocranius elongatus) — Lethrinidae — 4
iNaturalist ((c) Nicolò Palumbo, some rights reserved (CC BY-NC))
Emperor (Gymnocranius elongatus) — Lethrinidae — 5
Australian National Fish Collection, CSIRO (CC BY-NC 4.0) via GBIF
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All data

Identification

English name
Emperor verified
Scientific name
Gymnocranius elongatus
Family
Lethrinidae
Other names
Forktail bigeye bream; Forktail large-eye bream; Large-eye bream; Seabream; Swallowtail sea bream; Swallowtail seabream verified

Appearance

Size class
Medium verified
Max length (cm)
35.0 verified
Average length (cm)
25.0 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Silver / grey inferred
Pattern
Plain inferred
Tail shape
Forked 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
Sand / mud bottom sourced
Min depth (m)
50.0 verified
Max depth (m)
100.0 verified
Natural range
Indo-West Pacific, on sandy or low-relief rocky bottoms, often on offshore grounds. inferred
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Diet (detail)
Bottom-dwelling invertebrates sourced
Social behaviour
Small groups inferred
Territorial
No inferred
Activity
Diurnal inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Large eyes and a deeply forked tail; lives on offshore sandy grounds. sourced

For anglers

Edibility
Rarely eaten sourced
Fishing method
Bottom fishing with natural bait on sandy ground; also caught commercially by trawl. sourced
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

Same genus Gymnocranius

More from the family Lethrinidae

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