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Warty Corallimorph

Rhodactis osculifera

Also known as: false coral, False Coral, St. Thomas false coral, warty corallimorpharian

A tough, low-light Caribbean corallimorph that thrives where many corals struggle.

Warty Corallimorph
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© (c) Robin White, some rights reserved (CC BY-NC) · CC-BY NC

About

The warty corallimorph (Rhodactis osculifera) is one of the more forgiving soft cnidarians you can keep in a reef tank, and its natural range in the Western Atlantic, spanning Caribbean waters around Belize and Costa Rica up through the eastern seaboard of the United States and Canada, gives you a sense of just how adaptable this animal is. In the wild it occupies reef-associated environments, often tucking into areas with reduced light and gentle water movement, which makes it genuinely unusual among corallimorphs that hail from such a broad geographic range. The body has a warty, textured disc that can expand considerably when the animal is settled and comfortable, giving it a disheveled, almost anemone-like presence that earns it common names like false coral and coral anemone. It lacks the calcium carbonate skeleton of true stony corals, but its fleshy disc can look surprisingly coral-like under dim aquarium lighting. For hobbyists, the appeal is real: this species asks for low light and low flow, tolerates the kind of imperfect conditions that newer reef keepers often deal with, and generally minds its own business in a mixed system. A solid, honest choice for a beginner reef setup.

Frequently asked questions

What water parameters does the Warty Corallimorph need?
The Warty Corallimorph does best with a temperature of 72–82°F, a pH of 8–8.4.
Is the Warty Corallimorph aggressive?
The Warty Corallimorph is generally peaceful and suits a community tank with similarly calm tankmates.
Is the Warty Corallimorph reef safe?
The Warty Corallimorph is generally considered reef safe.