Black Ocellaris Clownfish

The Black Ocellaris Clownfish is a striking dark color form of the familiar Ocellaris Clownfish. Mature specimens display a rich brown-black to jet-black body crossed by three crisp white bands, often with warm orange remaining around the face or mouth. Younger fish may show more orange coloration before gradually darkening as they develop. 

Sometimes called the Darwin Ocellaris or Darwin False Percula, this naturally occurring color variation originated around Darwin in northern Australia. Nearly all Black Ocellaris Clownfish available to marine aquarists are captive-bred, making them well adapted to aquarium life and prepared foods. The underlying species reaches approximately 4.3 inches, with mature females growing larger than males. 

Its dramatic black-and-white coloration, manageable adult size, and dependable coral compatibility make this saltwater fish an excellent choice for reef aquariums and peaceful fish-only aquariums. An anemone is not required, and captive-bred specimens may instead establish a territory around rockwork, a cave, or another sheltered part of the aquarium.

Quick Care Guide

Care Level: Easy
Minimum Tank Size: 30 gallons
Temperament: Semi-aggressive
Diet: Omnivore
Reef Safe: Yes
Region: Captive-bred; ancestral black form from the Darwin region of northern Australia
Scientific Name: Amphiprion ocellaris

Tank Requirements

Provide a stable marine aquarium with live rock, caves, overhangs, and at least one protected area the clownfish can claim as its territory. Although this species does not require extensive open-water swimming space, the aquascape should allow easy movement around its chosen shelter and provide room for tankmates to avoid the defended area.

A sand or fine-gravel substrate is suitable, but no specialized substrate is necessary. Moderate, varied water movement is appropriate, provided a calmer resting area is available. Protect exposed pump intakes and use a securely fitted lid or mesh cover, especially during introduction or territorial disputes.

A host anemone is optional. Black Ocellaris Clownfish can thrive without one and may adopt a rock cave, coral colony, powerhead area, or aquarium corner instead. Any anemone should be selected and maintained according to its own lighting, feeding, maturity, and water-quality requirements.

Diet and Feeding

The Black Ocellaris Clownfish is an adaptable omnivore that readily accepts a wide variety of aquarium foods. Offer mysis shrimp, enriched brine shrimp, copepods, finely chopped shrimp or clam, frozen marine blends, and appropriately sized marine pellets or flakes. Include spirulina-enriched foods and other algae-containing preparations for dietary balance.

Feed one or two small meals daily. Juveniles and newly introduced specimens may benefit from two smaller feedings while they acclimate. Avoid offering more food than the fish can consume within a few minutes.

Captive-bred Ocellaris Clownfish are generally dependable feeders and adapt readily to frozen and prepared diets. 

Temperament and Tankmates

Black Ocellaris Clownfish are among the more manageable clownfish, but established adults may become territorial around a preferred cave, substitute host, anemone, or spawning site. A mature female is normally the largest and most dominant member of a pair.

Suitable tankmates include gobies, blennies, cardinalfish, firefish, peaceful wrasses, dwarf angelfish, and other community marine fish that will not attempt to eat or continually harass the clownfish. Introduce very timid fish before an established pair whenever possible.

Keep one specimen or a compatible pair in most aquariums. When pairing unfamiliar fish, selecting individuals of noticeably different sizes can help establish the normal hierarchy. Avoid combining two mature females or maintaining several clownfish pairs in a modest aquarium, as aggression can become severe once territories are established.

Reef Compatibility

The Black Ocellaris Clownfish is reef safe. It does not normally consume healthy stony corals, soft corals, zoanthids, clams, ornamental shrimp, crabs, or snails.

Some individuals may adopt a large-polyp stony coral, soft coral, mushroom, or other sessile animal as a substitute host. Repeated rubbing and vigorous movement may irritate a sensitive coral even though the clownfish is not feeding on it. Monitor any adopted coral that remains closed or shows signs of persistent stress.

Water Parameters

Temperature: 75–80°F
Specific Gravity: 1.024–1.026
pH: 8.1–8.4
Alkalinity: 8–12 dKH

Maintain dependable biological filtration, consistent salinity, and good oxygenation. Stable water conditions are more important than repeatedly adjusting the aquarium to achieve one exact reading.

Common Considerations

• Color develops with maturity: Young fish may retain orange or brown areas that become progressively darker.

• An anemone is not required: Captive-bred specimens can live normally without a host anemone.

• Expect territorial behavior: An established individual or pair may defend its chosen shelter.

• Keep one compatible pair: Multiple pairs or two mature females may fight in confined aquariums.

• Allow for individual variation: The depth of black coloration and amount of orange remaining on the face can vary between specimens.