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Spotted sawtail (Prionurus maculatus) — Acanthuridae

Spotted sawtail

Prionurus maculatus
Family: Acanthuridae

The Spotted sawtail (Prionurus maculatus) is a brackish-water fish of the family Acanthuridae that grows up to 45 cm.

Length
45 cm
Water
Brackish
Depth
0–20.0 m
Diet
Herbivore
Activity
Diurnal
Body shape
Torpedo-shaped
Substrate
Stone or rock
Danger
Can cause injury
Range
Oceania: Australia, New Caledonia, New Zealand, Kermadec Is., Norfolk I., Lord Howe I.
Edibility
Commonly eaten

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Description

The spotted sawtail is a sawtail surgeonfish (Acanthuridae) from temperate reef waters of the western Pacific, around Australia and Japan. The species grows to about 45 cm and has a deep, grey-brown body with fine dark spots and a row of sharp, bony plates on the tail base that act as scalpels. As a reef-dweller it grazes algae from rocks and coral in groups. The tail plates can cause deep cuts when handled; otherwise the fish is harmless to humans.

Frequently asked questions

How do you recognise the Spotted sawtail?

The Spotted sawtail has a torpedo-shaped body, is mainly brown and shows a spots pattern. Bears sharp spines, plates or strong jaws that can cause cuts or puncture wounds; handle with care.

Where does the Spotted sawtail live?

The Spotted sawtail lives in brackish water and is mostly found around stony or rocky ground. Oceania: Australia, New Caledonia, New Zealand, Kermadec Is., Norfolk I., Lord Howe I.

How big does the Spotted sawtail get?

The Spotted sawtail grows to a maximum of about 45 cm.

Is the Spotted sawtail dangerous to humans?

The Spotted sawtail can cause injury; handle it with care. Do not grab the fish by the tail: sawtails carry sharp, scalpel-like bony plates on the tail base that can cause deep cuts. For a cut: clean, apply pressure to stop bleeding and cover with a sterile dressing; for a deep wound seek medical assessment and check tetanus status.

Is the Spotted sawtail edible?

Yes, the Spotted sawtail is commonly eaten.

More photos

Spotted sawtail (Prionurus maculatus) — Acanthuridae — 2
Wikimedia Commons — Susan Prior (CC BY 4.0)
Spotted sawtail (Prionurus maculatus) — Acanthuridae — 3
iNaturalist ((c) Marine Explorer (Dr John Turnbull), some rights reserved (CC BY-NC-SA))
Spotted sawtail (Prionurus maculatus) — Acanthuridae — 4
iNaturalist ((c) Michal, some rights reserved (CC BY-NC))
Spotted sawtail (Prionurus maculatus) — Acanthuridae — 5
gabrielleoutoftheblue (CC BY-NC 4.0) via GBIF — iNaturalist
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All data

Identification

English name
Spotted sawtail sourced
Scientific name
Prionurus maculatus
Family
Acanthuridae
Other names
Spotted sawtail surgeonfish; Surgeonfish; Yellowspotted sawtail verified

Appearance

Size class
Large verified
Max length (cm)
45.0 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Brown sourced
Pattern
Spots sourced
Tail shape
Crescent (lunate) inferred

Habitat & distribution

Water type
Brackish sourced
Substrate
Stone or rock sourced
Max depth (m)
20.0 verified
Natural range
Oceania: Australia, New Caledonia, New Zealand, Kermadec Is., Norfolk I., Lord Howe I. sourced
Origin
Native inferred

Behaviour & biology

Diet
Herbivore sourced
Diet (detail)
Algae, seaweeds and plant material inferred
Territorial
No inferred
Activity
Diurnal inferred
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Bears sharp spines, plates or strong jaws that can cause cuts or puncture wounds; handle with care. inferred

For anglers

Edibility
Commonly eaten inferred
Fishing method
Fishing with natural bait (fish, shrimp, worm) or lures close to reef and rock structures. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Can cause injury verified
First aid
Do not grab the fish by the tail: sawtails carry sharp, scalpel-like bony plates on the tail base that can cause deep cuts. For a cut: clean, apply pressure to stop bleeding and cover with a sterile dressing; for a deep wound seek medical assessment and check tetanus status. sourced

Status & sources

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

Same genus Prionurus

More from the family Acanthuridae

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