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Blue emperor (Lethrinus nebulosus) — Lethrinidae

Blue emperor

Lethrinus nebulosus
Family: Lethrinidae
LC · Least Concern

The Blue emperor (Lethrinus nebulosus) is a brackish-water fish of the family Lethrinidae that grows up to 87 cm.

Length
87 cm
Water
Brackish
Depth
10.0–75.0 m
Diet
Carnivore
Behaviour
Small groups
Activity
Diurnal
Body shape
Torpedo-shaped
Substrate
Stone or rock
Danger
Venomous / poisonous
Edibility
Highly prized

Description

The spangled emperor is a large reef fish of the family Lethrinidae widely distributed across the Indo-West Pacific. The species has a bronze body with blue spangles on the scales and blue lines on the cheeks, and reaches about 87 cm. It inhabits coral reefs, lagoons, seagrass beds, mangroves and sand bottoms; adults live singly or in small schools. The diet consists of echinoderms, molluscs and crustaceans. The species is a highly prized sport and food fish. Larger individuals can carry ciguatera toxin.

Frequently asked questions

How do you recognise the Blue emperor?

The Blue emperor has a torpedo-shaped body, is mainly brown and shows a spots pattern.

Where does the Blue emperor live?

The Blue emperor lives in brackish water and is mostly found around stony or rocky ground.

How big does the Blue emperor get?

The Blue emperor grows to a maximum of about 87 cm. On average the species is around 70 cm.

Is the Blue emperor dangerous to humans?

The Blue emperor is venomous — handle spines with care and seek medical help after a sting if needed.

Is the Blue emperor edible?

Yes, the Blue emperor is a highly prized food fish.

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All data

Identification

Dutch name
Gevlekte keizer sourced
English name
Blue emperor verified
Scientific name
Lethrinus nebulosus
Family
Lethrinidae
Other names
Emperor; Emperor fish; Green snapper; Lesser spangled emperor verified

Appearance

Size class
Extra large verified
Max length (cm)
87.0 verified
Average length (cm)
70.0 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Brown inferred
Pattern
Spots inferred
Tail shape
Forked inferred
Mouth position
Terminal inferred
Lips
Thick / fleshy inferred
Barbels
No sourced
Dorsal fins
One continuous inferred
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Brackish sourced
Substrate
Stone or rock sourced
Min depth (m)
10.0 verified
Max depth (m)
75.0 verified
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Social behaviour
Small groups inferred
Territorial
No inferred
Activity
Diurnal inferred
Reproduction
Protogynous (female first) sourced
Sexual dimorphism
No inferred
levensduur_max_jaar
28.0 verified

For anglers

Edibility
Highly prized sourced
Fishing method
Gevangen met hengel, fuiken en netten; gewilde sport- en consumptievis. sourced
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Venomous / poisonous sourced

Status & sources

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

Same genus Lethrinus

More from the family Lethrinidae

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