The Ocellaris Clownfish, also known as the Common Clown or False Percula, is among the most recognizable fish on Indo-Pacific reefs and remains the benchmark introduction to marine fishkeeping. The classic presentation is a warm orange body crossed by three white bars outlined in black, though regional variation runs from vivid orange to nearly black-and-white forms. It is separated from the similar True Percula Clownfish by its generally narrower black banding where the white bars meet the orange base. Adults reach roughly 4.3 inches, with females growing noticeably larger than males, and specimens offered to the hobby typically originate from Indonesia.

House adults in an aquarium of at least 30 gallons, furnished with abundant live rock so the fish can establish a defensible territory and retreat when startled. A fine sand or mixed marine substrate of about one to two inches suits the species, and caves, crevices, and coral structure give it a sense of security. Water movement should be low to moderate; in fish-only systems, oscillating flow keeps the water column active without pushing the fish around. Stability matters more than any single number, so aim for consistent parameters rather than chasing adjustments. A host anemone such as a Bubble Tip Anemone allows natural symbiotic behavior to develop, but it is not a requirement, and captive-bred clownfish thrive without one, often adopting a rock or coral as a surrogate home.

Expect a fish that spends most of its time in the open, hovering near its chosen anchor point with the characteristic bobbing, up-and-down swimming motion that distinguishes the species. That combination of visibility, hardiness, and personality is why the Ocellaris Clownfish anchors so many first reef displays and continues to hold a place in mature systems.