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Blackcheek tonguefish (Symphurus plagiusa) — Cynoglossidae

Blackcheek tonguefish

Symphurus plagiusa
Family: Cynoglossidae
LC · Least Concern

The Blackcheek tonguefish (Symphurus plagiusa) is a fish that lives in both fresh and salt water of the family Cynoglossidae that grows up to 21 cm.

Length
21 cm
Water
Euryhaline
Depth
0.0–183.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Harmless
Range
Western Atlantic along the coast of North America, on soft sand and silty bottoms of shallow coastal water and estuaries; tolerates brackish water.
Edibility
Not eaten

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Description

The blackcheek tonguefish is a small, leaf-shaped flatfish of the family Cynoglossidae (tonguefishes) reaching about 21 cm. The elongate, rearward-tapering body has both eyes on the left side; the dorsal, caudal and anal fins merge continuously into a pointed tip. The upper side is brown and marbled, often with a dark spot on the gill cheek, the underside pale. Like all flatfish the larva starts symmetrical and tilts onto the bottom as it grows. The species lives buried on soft sand and mud bottoms of shallow coastal water and estuaries along the American Atlantic coast and tolerates brackish water. On the bottom it searches for small crustaceans, worms and molluscs.

Frequently asked questions

How do you recognise the Blackcheek tonguefish?

The Blackcheek tonguefish has an elongate, eel-like body, is mainly brown and shows a marbled pattern. Small, leaf-shaped flatfish with both eyes on the left side; dorsal, caudal and anal fins merge into a pointed tip.

Where does the Blackcheek tonguefish live?

The Blackcheek tonguefish lives in both fresh and salt water and is mostly found around sand or mud bottom. Western Atlantic along the coast of North America, on soft sand and silty bottoms of shallow coastal water and estuaries; tolerates brackish water.

How big does the Blackcheek tonguefish get?

The Blackcheek tonguefish grows to a maximum of about 21 cm.

Is the Blackcheek tonguefish dangerous to humans?

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

Is the Blackcheek tonguefish edible?

The Blackcheek tonguefish is not usually eaten.

More photos

Blackcheek tonguefish (Symphurus plagiusa) — Cynoglossidae — 2
Wikimedia Commons — Smithsonian Environmental Research Center (CC BY 2.0)
Blackcheek tonguefish (Symphurus plagiusa) — Cynoglossidae — 3
Wikimedia Commons — Hugh McCormick Smith (Public domain)
Blackcheek tonguefish (Symphurus plagiusa) — Cynoglossidae — 4
iNaturalist ((c) Kathy Richardson, some rights reserved (CC BY))
Blackcheek tonguefish (Symphurus plagiusa) — Cynoglossidae — 5
Wikimedia Commons — Smithsonian Environmental Research Center (CC BY 2.0)
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All data

Identification

English name
Blackcheek tonguefish verified
Scientific name
Symphurus plagiusa
Family
Cynoglossidae
Other names
Blackcheek Tonguefish; Blackcheek tonguefish verified

Appearance

Size class
Medium verified
Max length (cm)
21.0 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown sourced
Pattern
Marbled sourced
Tail shape
Rounded inferred
Mouth position
Inferior (downward) inferred
Lips
Thin inferred
Barbels
No verified
Dorsal fins
One continuous sourced
Dorsal spines
No verified

Habitat & distribution

Water type
Euryhaline verified
Substrate
Sand / mud bottom verified
Min depth (m)
0.0 verified
Max depth (m)
183.0 verified
Natural range
Western Atlantic along the coast of North America, on soft sand and silty bottoms of shallow coastal water and estuaries; tolerates brackish water. verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Diet (detail)
Small crustaceans, worms and molluscs from the bottom sourced
Social behaviour
Solitary verified
Territorial
No verified
Activity
Nocturnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
No verified
Seasonality
Spawns in the warm season in coastal water; eggs and larvae drift in open water until the larva flattens. sourced
Special features
Small, leaf-shaped flatfish with both eyes on the left side; dorsal, caudal and anal fins merge into a pointed tip. sourced

For anglers

Edibility
Not eaten verified
Fishing method
Bottom fishing with natural bait (worm, shrimp or fish) on or just above the seabed. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified
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 Symphurus

More from the family Cynoglossidae

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