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Aol (Spratelloides delicatulus) — Clupeidae

Aol

Spratelloides delicatulus
Family: Clupeidae
LC · Least Concern

The Aol (Spratelloides delicatulus) is a saltwater fish of the family Clupeidae that grows up to 7 cm.

Length
7 cm
Water
Saltwater
Depth
0.0–50.0 m
Diet
Carnivore
Behaviour
Schooling
Body shape
Torpedo-shaped
Substrate
Stone or rock
Danger
Harmless
Range
Indo-Pacific, from the Red Sea and East Africa to the western and central Pacific.
Edibility
Rarely eaten

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Description

The delicate round herring is a small herring-like fish of the family Clupeidae widely distributed across the Indo-Pacific. The species has a slender, silvery body with a bluish back and a shining lateral band, and reaches only about 7 cm. It is a schooling fish occurring in large numbers in clear coastal waters, lagoons and along reef margins, where it feeds near the surface on plankton. The species is of modest commercial importance: it is marketed fresh or salted-dried and is widely used as live bait for the tuna fishery.

Frequently asked questions

How do you recognise the Aol?

The Aol has a torpedo-shaped body, is mainly silver-grey and shows a horizontal stripes pattern. Forms large shoals in clear coastal waters; important as a bait fish for the tuna fishery.

Where does the Aol live?

The Aol lives in the sea (marine waters) and is mostly found around stony or rocky ground. Indo-Pacific, from the Red Sea and East Africa to the western and central Pacific.

How big does the Aol get?

The Aol grows to a maximum of about 7 cm.

Is the Aol dangerous to humans?

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

Is the Aol edible?

The Aol is rarely eaten.

More photos

Aol (Spratelloides delicatulus) — Clupeidae — 2
Williams, Jeffrey T. (CC0 1.0) via GBIF — USNM
Aol (Spratelloides delicatulus) — Clupeidae — 3
Williams, Jeffrey T. (CC0 1.0) via GBIF — USNM
Aol (Spratelloides delicatulus) — Clupeidae — 4
iNaturalist ((c) Joe Paquin, some rights reserved (CC BY-NC))
Aol (Spratelloides delicatulus) — Clupeidae — 5
iNaturalist ((c) Joe Paquin, some rights reserved (CC BY-NC))

Easily confused with

These species look like the Aol and live in the same waters.

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All data

Identification

English name
Aol verified
Scientific name
Spratelloides delicatulus
Family
Clupeidae
Other names
Banded blue sprat; Blue sprat; Blueback sprat; Bluebacked sprat; Delicate round herring; Blue-backed sprat; Round herring; Delicate roundherring; Northern blue sprat; Small round herring; Sprat; White bait verified

Appearance

Size class
Small verified
Max length (cm)
7.0 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Silver / grey inferred
Pattern
Horizontal stripes inferred
Tail shape
Forked inferred
Mouth position
Terminal inferred
Lips
Thin inferred
Barbels
No sourced
Dorsal fins
One continuous inferred
Dorsal spines
No sourced

Habitat & distribution

Water type
Saltwater sourced
Substrate
Stone or rock sourced
Min depth (m)
0.0 verified
Max depth (m)
50.0 verified
Natural range
Indo-Pacific, from the Red Sea and East Africa to the western and central Pacific. inferred
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Diet (detail)
Zooplankton sourced
Social behaviour
Schooling inferred
Territorial
No inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Forms large shoals in clear coastal waters; important as a bait fish for the tuna fishery. sourced

For anglers

Edibility
Rarely eaten sourced
Fishing method
Caught with small nets; used mainly as bait for the tuna fishery, also sold fresh or salted-dried. sourced
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 Spratelloides

More from the family Clupeidae

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