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Spotted sleeper (Eleotris balia) — Eleotridae

Spotted sleeper

Eleotris balia
Family: Eleotridae

The Spotted sleeper (Eleotris balia) is a fish that lives in both fresh and salt water of the family Eleotridae that grows up to 15 cm.

Length
15 cm
Water
Euryhaline
Diet
Carnivore
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Harmless
Range
Asia: China, Hong Kong, Viet Nam

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Description

The spotted sleeper is a sleeper goby (Eleotridae) from fresh and brackish water of islands and coasts in the Indo-West Pacific. The species grows to about 15 cm and has an elongate, dark-brown body with a broad, flattened head and separate pelvic fins; unlike true gobies these form no sucker. As a bottom-oriented ambush hunter it shelters among roots and stones in lower river reaches and estuaries and seizes small fish, crustaceans and insects. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Spotted sleeper?

The Spotted sleeper has an elongate, eel-like body, is mainly brown and shows a spots pattern.

Where does the Spotted sleeper live?

The Spotted sleeper lives in both fresh and salt water and is mostly found around sand or mud bottom. Asia: China, Hong Kong, Viet Nam

How big does the Spotted sleeper get?

The Spotted sleeper grows to a maximum of about 15 cm.

Is the Spotted sleeper dangerous to humans?

No, the Spotted sleeper is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.

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All data

Identification

English name
Spotted sleeper sourced
Scientific name
Eleotris balia
Family
Eleotridae

Appearance

Size class
Small
Max length (cm)
15 sourced
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown sourced
Pattern
Spots sourced
Tail shape
Rounded inferred

Habitat & distribution

Water type
Euryhaline sourced
Substrate
Sand / mud bottom sourced
Natural range
Asia: China, Hong Kong, Viet Nam sourced
Origin
Native inferred

Behaviour & biology

Diet
Carnivore inferred
Diet (detail)
Small fishes, crustaceans and invertebrates inferred
Territorial
No inferred
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred

For anglers

Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified
First aid
This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status. verified

Status & sources

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

Same genus Eleotris

More from the family Eleotridae

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