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Emperor (Lethrinus olivaceus) — Lethrinidae

Emperor

Lethrinus olivaceus
Family: Lethrinidae
LC · Least Concern

The Emperor (Lethrinus olivaceus) is a saltwater fish of the family Lethrinidae that grows up to 100 cm.

Length
100 cm
Water
Saltwater
Depth
1.0–185.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Diurnal
Body shape
Torpedo-shaped
Substrate
Stone or rock
Danger
Venomous / poisonous
Edibility
Rarely eaten

Description

The longface emperor is a large emperor from the Indo-West Pacific. The species grows to about 100 cm and has a streamlined, greyish body with a conspicuously long, pointed snout. As a fast reef predator it hunts fish, crustaceans and squid over sand and reef bottoms. It is a valued food fish, but in large specimens there are reports of ciguatera poisoning. The IUCN assesses the species as Least Concern (LC).

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.

Where does the Emperor live?

The Emperor lives in the sea (marine waters) and is mostly found around stony or rocky ground.

How big does the Emperor get?

The Emperor grows to a maximum of about 100 cm. On average the species is around 70 cm.

Is the Emperor dangerous to humans?

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

Is the Emperor edible?

The Emperor is rarely eaten.

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All data

Identification

Dutch name
Langsnuit-keizer verified
English name
Emperor verified
Scientific name
Lethrinus olivaceus
Family
Lethrinidae
Other names
Emperor; Long nose emperor; Longface emperor verified

Appearance

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

Habitat & distribution

Water type
Saltwater sourced
Substrate
Stone or rock sourced
Min depth (m)
1.0 verified
Max depth (m)
185.0 verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore sourced
Social behaviour
Solitary sourced
Territorial
No sourced
Activity
Diurnal sourced
Reproduction
Protogynous (female first) sourced
Sexual dimorphism
No sourced

For anglers

Edibility
Rarely eaten sourced
Fishing method
Handlijnen 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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