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Speckled dace (Rhinichthys osculus) — Cyprinidae

Speckled dace

Rhinichthys osculus
Family: Cyprinidae
LC · Least Concern

The Speckled dace (Rhinichthys osculus) is a freshwater fish of the family Cyprinidae that grows up to 11 cm.

Length
11 cm
Water
Freshwater
Diet
Omnivore
Behaviour
Schooling
Activity
Diurnal
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Harmless
Range
Western North America, in rocky riffles, runs and pools of headwaters, streams and small to medium-sized rivers; rarely in lakes.
Edibility
Not eaten

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Description

The speckled dace is a small, widespread minnow (family Leuciscidae) of western North America. The species reaches about 11 cm and has a streamlined, brown-silvery body with a speckled pattern and a short barbel. It inhabits rocky riffles, runs and pools of headwaters, creeks and small to medium rivers, and rarely occurs in lakes. Its diet consists of aquatic insect larvae, small invertebrates and algae. The species is highly variable across its large range. It is harmless to humans and of no fishery value.

Frequently asked questions

How do you recognise the Speckled dace?

The Speckled dace has an elongate, eel-like body, is mainly brown and shows a spots pattern. Small, speckled cyprinid of fast-flowing, rocky waters; very widespread and variable.

Where does the Speckled dace live?

The Speckled dace lives in fresh water and is mostly found around sand or mud bottom. Western North America, in rocky riffles, runs and pools of headwaters, streams and small to medium-sized rivers; rarely in lakes.

How big does the Speckled dace get?

The Speckled dace grows to a maximum of about 11 cm. On average the species is around 6 cm.

Is the Speckled dace dangerous to humans?

No, the Speckled dace is harmless to humans. None required: this species is harmless to humans.

Is the Speckled dace edible?

The Speckled dace is not usually eaten.

More photos

Speckled dace (Rhinichthys osculus) — Cyprinidae — 2
iNaturalist ((c) Grant Bowler, some rights reserved (CC BY-NC))
Speckled dace (Rhinichthys osculus) — Cyprinidae — 3
iNaturalist ((c) Owen Reeves, some rights reserved (CC BY-NC))
Speckled dace (Rhinichthys osculus) — Cyprinidae — 4
Wikimedia Commons — Barrett Paul, U.S. Fish and Wildlife Service (Public domain)
Speckled dace (Rhinichthys osculus) — Cyprinidae — 5
Wikimedia Commons — Brian Gratwicke (CC BY 2.0)
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All data

Identification

English name
Speckled dace verified
Scientific name
Rhinichthys osculus
Family
Cyprinidae
Other names
Speckled dace verified

Appearance

Size class
Small verified
Max length (cm)
11.0 verified
Average length (cm)
6.2 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown inferred
Pattern
Spots inferred
Tail shape
Forked inferred
Mouth position
Inferior (downward) inferred
Lips
Thin inferred
Barbels
Yes sourced
Dorsal fins
One continuous inferred
Dorsal spines
No sourced

Habitat & distribution

Water type
Freshwater sourced
Substrate
Sand / mud bottom sourced
Natural range
Western North America, in rocky riffles, runs and pools of headwaters, streams and small to medium-sized rivers; rarely in lakes. inferred
Origin
Native sourced

Behaviour & biology

Diet
Omnivore sourced
Diet (detail)
Aquatic insect larvae, small invertebrates and algae sourced
Social behaviour
Schooling inferred
Territorial
No inferred
Activity
Diurnal inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Small, speckled cyprinid of fast-flowing, rocky waters; very widespread and variable. 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 Rhinichthys

More from the family Cyprinidae

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