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Smallmouth hardyhead (Atherinosoma microstoma) — Atherinidae

Smallmouth hardyhead

Atherinosoma microstoma
Family: Atherinidae

The Smallmouth hardyhead (Atherinosoma microstoma) is a fish that lives in both fresh and salt water of the family Atherinidae that grows up to 11 cm.

Length
10.7 cm
Water
Euryhaline
Depth
0.0–8.0 m
Behaviour
Schooling
Activity
Diurnal
Body shape
Elongated (eel-like)
Substrate
Open water
Danger
Harmless

Description

The Smallmouth hardyhead is a silverside (Atherinidae) from shallow coastal, brackish or fresh water of coastal and estuarine water of southern Australia. The species has a slender, semi-translucent, silvery body with a shiny silver flank band and large eyes. As a schooling fish it swims in large groups near the surface and snaps at small zooplankton and insect larvae. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Smallmouth hardyhead?

The Smallmouth hardyhead has an elongate, eel-like body and is mainly silver-grey.

Where does the Smallmouth hardyhead live?

The Smallmouth hardyhead lives in both fresh and salt water and is mostly found around open water.

How big does the Smallmouth hardyhead get?

The Smallmouth hardyhead grows to a maximum of about 11 cm.

Is the Smallmouth hardyhead dangerous to humans?

No, the Smallmouth hardyhead is harmless to humans.

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All data

Identification

Dutch name
Kleinbek-koppoter sourced
English name
Smallmouth hardyhead sourced
Scientific name
Atherinosoma microstoma
Family
Atherinidae
Other names
Fanged hardyhead; Greyback; Smallmouth hardyhead; Small-mouth hardyhead verified

Appearance

Size class
Small verified
Max length (cm)
10.7 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Silver / grey sourced
Tail shape
Forked inferred

Habitat & distribution

Water type
Euryhaline sourced
Substrate
Open water sourced
Min depth (m)
0.0 verified
Max depth (m)
8.0 verified
Origin
Native inferred

Behaviour & biology

Social behaviour
Schooling sourced
Territorial
No inferred
Activity
Diurnal inferred
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred

For anglers

Fishing method
Klein van stuk en nauwelijks een hengelsportdoel; wordt vooral incidenteel of als aasvis gevangen. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified

Status & sources

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

Same genus Atherinosoma

More from the family Atherinidae

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