Amphiprion ocellaris is perhaps the world's most well-known marine aquarium fish. Many know it simply as “Nemo,” but thanks to aquarium breeding, the classic orange-and-white wild form is now just one of numerous different ocellaris color morphs.
The wild form has a bright orange base color with three white transverse stripes, usually bordered by a thin black area. The species closely resembles the Amphiprion percula clownfish, and the two species are still often confused with one another.
The Amphiprion ocellaris clownfish sold at Korallifarmi are always captive-bred, not wild-caught. Ocellaris was also one of the first marine aquarium fish to be successfully bred on a large scale. A long history of breeding has also made a large number of different color and pattern variations possible.
Pairing and behavior
It is recommended to keep ocellaris individually or, preferably, as a pair. Clownfish are protandrous hermaphrodites: the larger and dominant fish in the pair is the female, and the smaller is the male. If the female disappears, the male can change sex and develop into a female. This sex change only works in this direction; a female cannot become a male.
Ocellaris is among the more peaceful clownfish, but it is not always completely gentle. A pair will usually choose its own territory in the aquarium and may defend it against other fish, especially when sexually mature and during spawning. In a small aquarium, keeping multiple ocellaris can lead to the established pair harassing other individuals.
Does Nemo need a sea anemone?
No, it does not. A captive-bred ocellaris does perfectly well without a sea anemone.
In the wild, A. ocellaris lives in symbiosis with sea anemones. Its natural hosts include Heteractis magnifica, Stichodactyla gigantea, and Stichodactyla mertensii.
In an aquarium, the situation can be significantly more flexible. Captive-bred clownfish may take a host such as a bubble-tip anemone (Entacmaea quadricolor), even though it is not among the natural host species of the ocellaris. Sometimes an LPS coral, soft coral, corallimorph, or even a specific rock crevice or corner of the aquarium will suffice as a host.
If an ocellaris chooses a coral as its host, constant rubbing and dwelling in the coral can sometimes irritate it.
Feeding
Ocellaris is omnivorous and usually very easy to feed. Captive-bred individuals are already accustomed to standard aquarium foods.
It is recommended to combine high-quality marine fish pellets or granules with various frozen foods, such as mysis and brine shrimp. Foods containing algae are also suitable as part of a varied diet.
Spawning in the aquarium
A well-acclimated, sexually mature pair may also begin to spawn in a standard reef aquarium. The female usually lays the eggs on a cleaned hard surface near their territory or host. The male plays a large role in caring for the spawn: he guards the eggs and ensures water circulation with his fins. Depending on the temperature, the eggs hatch after about a week.
However, spawning does not mean that little Nemos will appear in the aquarium by themselves. Newly hatched larvae are extremely small planktonic fry. In a standard reef aquarium, they easily end up as food for other animals or in the filtration system.
Raising the fry requires a separate rearing tank and suitable live starter food, usually rotifers. Later, the diet can be transitioned to, for example, newly hatched brine shrimp. Actual breeding is therefore a completely different matter than a pair successfully spawning.
Care instructions
Minimum aquarium size: approx. 75 liters for one or a pair
Temperature: approx. 24–27 °C
Salinity: approx. 34–35 ppt
Diet: omnivorous; high-quality dry foods and varied frozen foods
Behavior: generally peaceful, but may defend its territory especially as a pair and during spawning
Maximum size: approx. 11 cm
Reef safe: yes. Does not eat corals or common reef invertebrates, but a coral chosen as a host can sometimes become irritated by the fish's constant presence.
Difficulty level: easy
Natural distribution: Indo-West Pacific
Individuals sold at Korallifarmi: always captive-bred
Color morphs
All the different-looking “designer” ocellaris are still the same Amphiprion ocellaris species. Advanced selective breeding has produced very different colorations and patterns, and new lines are still being developed. The names of the color morphs can also be breeder-specific.
Examples of well-known color morphs include Ocellaris, Misbar, Extreme Misbar, Black Ocellaris, Misbar Black Ocellaris, Extreme Misbar Black Ocellaris, Caramel, Snowflake, Premium Snowflake, Black Snowflake, Premium Black Snowflake, Black Ice Snowflake, Gladiator, Premium Gladiator, Mocha Gladiator, Wyoming White, Naked Ocellaris, Midnight, Domino, Frostbite, Black Frostbite, Black Storm, Snow Storm, and Zombie. In addition, Longfin lines are also bred from the species.
