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Coral Damsel

Pomacentrus coelestis (Coral/Neon Damsel; trade name varies)

Family

Damselfish / Pomacentridae

Care level

Beginner

Temperament

Semi-aggressive

Reef safe

Max size

8 cm

Min tank

100 L · 26 gal

Origin

Indo-Pacific

Diet

Omnivore

Food

Mysis, Brine shrimp, Marine pellets, Flake food, Nori

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Overview

The Coral Damsel is a small, vividly blue fish common to the marine hobby, valued for its bright colour, hardiness, and low cost, making it a frequent choice for cycling a new tank or adding easy colour to a beginner setup. Its small size and adaptability mean it tolerates a wide range of water conditions better than most other reef fish.

Like many damselfish, it can become territorial as it matures, particularly in smaller tanks, and this is worth planning for before purchase rather than a surprise later on.

Its full reef safety and easy care make it a practical choice for new reef keepers, though its temperament means careful thought about tankmates and tank size pays off.

Compatibility

Coral Damsels can be semi-aggressive, especially as they mature, and may bully smaller or more passive tankmates introduced after them, particularly in tanks under 200 litres. They do best introduced early in a tank's stocking order, or kept with similarly robust tankmates.

They are fully reef safe and won't bother corals, clams, or invertebrates.

Health & quarantine

This is one of the hardiest fish in the marine hobby, often used to help cycle new tanks due to its tolerance of less-than-perfect water conditions. A standard quarantine period of two to four weeks is still good practice, though this species rarely has acclimation issues.

Frequently asked questions

Is the Coral Damsel reef safe?

Yes, fully reef safe with corals and invertebrates.

Will my Coral Damsel become aggressive?

It can become territorial as it matures, especially in smaller tanks, so plan tankmates and stocking order with this in mind.

Is the Coral Damsel a good fish to cycle a new tank?

Yes, it's one of the hardiest marine fish available and commonly used for this purpose, though fishless cycling is now generally preferred.

What tank size suits a Coral Damsel?

100 litres is a reasonable minimum given its small size, though more room reduces territorial issues.

Is the Coral Damsel a good beginner fish?

Yes, it's extremely hardy and easy to feed, though its temperament should be considered when planning tankmates.

Care guidance is drawn from our own experience — every fish is an individual, so treat it as a starting point, not a guarantee. Not sure if a species suits your tank? Come ask us in store. New to the terms? Read the care-terms glossary.