Neon Damselfish

Greek Name: Pomacentrus alleni



The Neon Damselfish is also known as Allen’s Damselfish and Allen’s Pomacentrus. The name is a tribute to Allen, Dr. Gerald Allen, the scientist who is well known in the world on damselfishes.

The slender fish is neon blue with a blending of yellow towards the body’s bottom and the anterior fin. The Pomacentrus coelestis species, which is similar to the other fish, could also be referred to as the Neon Damselfish.

It is considered to be a moderately aggressive species of fish that needs hiding spots in a 20 gallon or bigger aquarium.

The Neon Damselfish diet must consist of a wide range of meaty food items, prepared herbivore meals, as well as flaked food items.

Approximate Purchase Size: 1″ to 1-1/2″





Care Level




Color Form

Blue, Green, Orange



Reef Compatible


Water Conditions

sg 1.020-1.025, 72-78° F, dKH 8-12, pH 8.1-8.4

Max Size



Indonesia, Sri Lanka



Minimum Tank

30 gallons


Neon Damselfish Information

Neon Damselfish (Pomacentrus alleni) is a vibrant species of Damselfish that displays neon blue, green, and yellowish/orange colors. Although they are considered to be a species that is easy to maintain in the aquarium, however, they only show their full spectrum of color when they are satisfied with the conditions of the tank and their tankmates. Neon Damselfish’s colors appear dull when conditions in the water aren’t ideal or they’re getting spooked by aggressive tankmates.

Although it is a Damselfish species, Neon Damsel is more like the Chromis species than the standard Damselfish species. They are docile and shouldn’t have any issues coexisting peacefully with other reef species. A group of Neon Damselfish is an ideal part of a reef or a FOWLR aquarium that has other calm to semi-aggressive tank companions.


Neon Damselfish Diet

Neon Damselfish is an omnivore. They must be a diverse diet that includes live, frozen, or freeze-dried, as well as high in vitamin content foods such as Mysis Shrimp, brine shrimp the cyclop-eeze, formula I and II. As well as other food items that are prepared, like Spirulina-based carnivore and herbivore pellets and flakes.



Additional information


Large, Medium, Small

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