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Riverine stargazer (Dactyloscopus amnis) — Dactyloscopidae

Riverine stargazer

Dactyloscopus amnis
LC · Least Concern

The Riverine stargazer (Dactyloscopus amnis) is a brackish-water fish of the family Dactyloscopidae that grows up to 6 cm.

Length
6 cm
Water
Brackish
Diet
Carnivore
Behaviour
Solitary
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Harmless
Range
Eastern Pacific, in estuaries and lower rivers of Central America.
Edibility
Not eaten

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Description

The riverine stargazer is a small bottom fish of the sand stargazer family (Dactyloscopidae) from the eastern Pacific, along the coast of Central America. The species reaches only a few centimetres and has an elongate body with upward-directed eyes and mouth. Unlike most sand stargazers it tolerates brackish water and occurs in estuaries and the lower reaches of rivers. It largely buries itself in the sand, with only the eyes visible, and seizes passing small bottom invertebrates. Owing to its hidden habits the species is little noticed.

Frequently asked questions

How do you recognise the Riverine stargazer?

The Riverine stargazer has an elongate, eel-like body, is mainly brown and shows a marbled pattern. Buries itself in sand with only its upward-directed eyes visible; tolerates brackish water.

Where does the Riverine stargazer live?

The Riverine stargazer lives in brackish water and is mostly found around sand or mud bottom. Eastern Pacific, in estuaries and lower rivers of Central America.

How big does the Riverine stargazer get?

The Riverine stargazer grows to a maximum of about 6 cm. On average the species is around 4 cm.

Is the Riverine stargazer dangerous to humans?

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

Is the Riverine stargazer edible?

The Riverine stargazer is not usually eaten.

More photos

Riverine stargazer (Dactyloscopus amnis) — Dactyloscopidae — 2
iNaturalist ((c) Rodrigo Arrazola, some rights reserved (CC BY-NC))
Riverine stargazer (Dactyloscopus amnis) — Dactyloscopidae — 3
Wikimedia Commons — Unknown authorUnknown author (Public domain)
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All data

Identification

English name
Riverine stargazer verified
Scientific name
Dactyloscopus amnis
Family
Dactyloscopidae

Appearance

Size class
Small
Max length (cm)
6.0 sourced
Average length (cm)
4.0 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown inferred
Pattern
Marbled inferred
Tail shape
Rounded inferred
Mouth position
Superior (upward) inferred
Lips
Thick / fleshy inferred
Barbels
No sourced
Dorsal fins
One continuous inferred
Dorsal spines
No sourced

Habitat & distribution

Water type
Brackish sourced
Substrate
Sand / mud bottom sourced
Natural range
Eastern Pacific, in estuaries and lower rivers of Central America. inferred
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Diet (detail)
Small bottom-dwelling invertebrates sourced
Social behaviour
Solitary 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
Buries itself in sand with only its upward-directed eyes visible; tolerates brackish water. sourced

For anglers

Edibility
Not eaten sourced
Fishing method
Not a target species for angling; at most an incidental catch or usable as baitfish. 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

Same genus Dactyloscopus

More from the family Dactyloscopidae

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