Tomato clownfish

What it is

This small reef fish belongs to the family Pomacentridae, which includes damselfishes. Adults display a bright orange-red body with a single white vertical stripe behind the eyes. This bar has a distinct black outline and joins over the head. Females often show dark spots or blackish sides, while males remain smaller and redder. Juveniles appear darker with two or three white bars. The species grows up to 14 centimetres long and possesses nine to ten dorsal spines.

Where it lives

Its natural range covers the Western Pacific Ocean. Populations extend from the Ryukyu Islands of Japan in the north down through the South China Sea. They inhabit waters around Malaysia and reach as far south as Indonesia. These fish prefer sheltered environments such as shallow lagoons and protected coral reefs. They are typically found in warm tropical waters where their host anemones thrive.

How it lives

In the wild, this species forms a mutualistic bond with sea anemones. The anemone provides protection from predators using its stinging tentacles, which do not harm the fish. In return, the clownfish defends the host and cleans it. Groups follow a strict hierarchy led by the largest female. Only the dominant pair reproduces. The fish is known to be territorial and can act aggressively toward other species, especially when mature.

Breeding and life cycle

These fish are sequential hermaphrodites, meaning they start life as males. If the dominant female dies, the largest male changes sex to become female. Breeding occurs through external fertilization within the group. In captivity, hobbyists can breed them successfully. The resulting fry feed on rotifers and baby brine shrimp during their early development stages.

Fish and people

Aquarium enthusiasts value this species for its resilience and vivid appearance. It adapts well to tank life even without a live anemone, often adopting corals instead. Keepers recommend a minimum tank volume of 76 litres. Due to its aggressive nature, it is best housed singly or as a mated pair. It accepts various foods, including dried algae and shrimp. Quarantine tanks help prevent diseases before introduction to main displays.

Relatives and look-alikes

The Australian clownfish looks similar but lacks the strong black outline on its head band. Its white band may also be discontinuous. The cinnamon clownfish is another lookalike, distinguished by a broader head bar and black fins outside Melanesia. Geographic location helps distinguish juveniles from these similar species, as physical differences can be subtle in young fish.

Questions people ask about Tomato clownfish

Good reading and sources

• Tomato clownfish on WikipediaEncyclopedia
• More photos on Wikimedia CommonsPhotos
• Wikidata recordOpen data