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Emerald notothen (Trematomus bernacchii) — Nototheniidae

Emerald notothen

Trematomus bernacchii
Family: Nototheniidae

The Emerald notothen (Trematomus bernacchii) is a saltwater fish of the family Nototheniidae that grows up to 28 cm.

Length
28 cm
Water
Saltwater
Depth
0.0–700.0 m
Diet
Carnivore
Behaviour
Solitary
Body shape
Torpedo-shaped
Substrate
Sand / mud bottom
Danger
Harmless
Edibility
Rarely eaten

Description

The emerald rockcod is an Antarctic notothen (Nototheniidae) from the icy waters around Antarctica. The species has a stocky body with a large head and is superbly adapted to the extremely low, stable temperatures (around freezing) thanks to antifreeze proteins in its blood. It lives bottom-bound on the continental shelf. As a bottom hunter it feeds on small crustaceans, worms and other invertebrates. The species is harmless to humans.

Frequently asked questions

How do you recognise the Emerald notothen?

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

Where does the Emerald notothen live?

The Emerald notothen lives in the sea (marine waters) and is mostly found around sand or mud bottom.

How big does the Emerald notothen get?

The Emerald notothen grows to a maximum of about 28 cm. On average the species is around 25 cm.

Is the Emerald notothen dangerous to humans?

No, the Emerald notothen is harmless to humans.

Is the Emerald notothen edible?

The Emerald notothen is rarely eaten.

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All data

Identification

Dutch name
Smaragd-ijskabeljauw sourced
English name
Emerald notothen verified
Scientific name
Trematomus bernacchii
Family
Nototheniidae
Other names
Emerald rockcod verified

Appearance

Size class
Medium verified
Max length (cm)
28.0 verified
Average length (cm)
25.0 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Brown inferred
Pattern
Spots inferred
Tail shape
Straight inferred
Mouth position
Terminal inferred
Lips
Thick / fleshy inferred
Barbels
No sourced
Dorsal fins
Two separate inferred
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Saltwater sourced
Substrate
Sand / mud bottom sourced
Min depth (m)
0.0 verified
Max depth (m)
700.0 verified
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Social behaviour
Solitary inferred
Territorial
No inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred
levensduur_max_jaar
10.0 verified

For anglers

Edibility
Rarely eaten sourced
Fishing method
Bodemvissen met natuurlijk aas (worm, garnaal of vis) op of vlak boven de bodem. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless sourced

Status & sources

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

Same genus Trematomus

More from the family Nototheniidae

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