Andaman/Allen’s Damselfish

Andaman/Allen’s Damselfish Pomacentrus alleni

Type of Animal:

Reefs/associated areas

E Indian Ocean

Small neon blue fish w/ yellow anal fin & broad black streak along lower tail fin

Phytoplankton, zooplankton, algae, vegetable matter, krill, scallops, shrimp, clams, fish

Status in Wild:

Breeding in aquaculture & aquariums. Captive breeding reducing demand for wild-caught fish.

Schools of 2-1,000

Additional Info:

Young: Fry
Group: School
0.003 oz

3-5 days 

Life Span:
2-6 years

Body Length:
1.5-2.4 in

Also called Neon Damselfish & Allen’s Pomacentrus.
These fish sometimes appear in aquarium trade.
Eggs adhere to substrate.
Males guard/aerate eggs.
These fish like to hide & are shy.
Typically spawn on undersides of rocks.
These fish are rather difficult to breed in captivity.
Active during the day (diurnal).
There can be hundreds of eggs in single clutch & single male can guard up to 30 clutches of eggs per spawning period.
While schooling fish, some territorial behavior shown. Territories often guarded by group.
To aerate eggs, male will fan them.
Sometimes seen schooling w/ related species.
When eggs hatch, they go through larval stage. They become juveniles after larval stage.
These fish help keep algae populations in check.

Main predators are larger fish.

Fun Fact(s):
Named after ichthyologist Gerry Allen-known as the world’s top damselfish expert.
They sometimes become pale or brownish when stressed.

3 thoughts on “Andaman/Allen’s Damselfish


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