Ocellaris clownfish

Three white bands and vivid orange mark the typical form of the ocellaris clownfish. In the aquarium, you can observe pair behaviour, territory and parental care.

Amphiprion ocellaris belongs to the damselfish family. The Florida Museum reports a maximum total length of 11 cm. Plan for adult fish, even when buying small juveniles.

An ocellaris pair needs a cycled marine aquarium and regular care. Plan the tank, tankmates and feeding before buying.

Ask about captive-bred fish, their scientific name and familiar food. Ask to see both feeding. Before taking them home, agree an acclimation plan with the retailer that accounts for transport and water conditions.

If you want an anemone, include its space, lighting and water-quality needs in your plan from the start.

Plan the tank for a compatible pair and all intended tankmates. Adult fish need retreats, open swimming areas and enough space outside the pair's territory.

OATA's 60 litres applies to a single pair of small clownfish with no other fish, not as a universal buying recommendation. Marubis recommends at least 200 litres with a host anemone for ocellaris. For a new tank with an anemone and other inhabitants, 200 litres is the more cautious starting point. SDAT also advises larger, biologically stable tanks with room for tankmates.

OATA recommends two juveniles that can develop into a pair. A male can change into a female, but two adults are not automatically compatible. Marubis advises against group housing.

Marubis and SDAT recommend keeping ocellaris with an anemone; OATA describes successful aquarium care without one. In the wild, the fish uses its anemone's tentacles for shelter and remains closely associated with it.

Natural hosts include Heteractis magnifica, Stichodactyla gigantea and Stichodactyla mertensii. SDAT identifies the bubble-tip anemone Entacmaea quadricolor as a commonly used aquarium partner. Before buying, check that you can meet its own care requirements.

Ocellaris are considered relatively unaggressive among clownfish. They still defend their territory, especially when tending eggs. Other inhabitants need to swim and feed undisturbed outside it.

Persistent chasing, a fish trapped in a corner or damaged fins are reasons to reassess the stocking. The smaller fish in the pair also needs a retreat and access to food.

OATA recommends small meals twice daily, eaten within a few minutes. Suitable pellets or flakes form the base, supplemented with frozen mysis or enriched brine shrimp. A whole frozen cube is not a fixed serving for a pair.

Start with a little and check that both fish eat it. Choose suitable food sizes, offer it at two locations if needed and adjust the portion to actual intake.

Prepare frozen food according to its label and remove leftovers. The bubble-tip anemone needs its own feeding plan; the fish's two daily meals do not automatically apply to it.

If a fish suddenly stops eating or breathes differently, check water quality and seek advice from your retailer or a fish veterinarian. Note when the change began. Adding extra food does not address the cause.

The ocellaris clownfish lives on coral and rocky reefs in the tropical Indo-Pacific, from Southeast Asia and the Ryukyu Islands to northwestern Australia.

The name “false percula” refers to a separate species, Amphiprion ocellaris. The similar-looking percula clownfish is Amphiprion percula. In the typical orange form, ocellaris usually has narrower black margins around its white bands; the Florida Museum also describes differences in the eyes and head shape.

Captive-bred varieties can look quite different. Ask for the scientific name instead of identifying a fish solely by its colour or trade name. Unusual markings do not change its need for a compatible partner, territory and suitable aquarium.

Eggs in the aquarium do not mean breeding has been successful. If you want to raise young fish, prepare a suitable separate rearing setup and appropriate live food before the first hatch.

At feeding time, watch both fish: food intake, their usual location, breathing and fins. Brief, regular notes help you recognise changes.

When sharing experiences, include tank size, tankmates, how long the pair has lived together and whether you keep an anemone. This helps others understand your observations.