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Phyllacanthus irregularis

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description Phyllacanthus irregularis Overview

Phyllacanthus irregularis is a species of marine pencil urchin belonging to the family Cidaridae. It is found in the shallow coastal waters of Australia, where it inhabits rocky reefs and rubble. The echinoderm is distinguished by its thick, heavily armored, club-like primary spines, which provide defense against potential predators. These spines are typically covered in a layer of algae and encrusting organisms, blending the urchin into its surroundings.

help Phyllacanthus irregularis FAQ

What kind of animal is Phyllacanthus irregularis?

Phyllacanthus irregularis is a marine pencil urchin in the family Cidaridae. It is an echinoderm related to sea stars and other sea urchins.

Where does Phyllacanthus irregularis live?

The species is found in shallow coastal waters of Australia. It lives on rocky reefs and rubble rather than in open sandy water.

What do the spines of Phyllacanthus irregularis look like?

It has thick, heavily armored, club-like primary spines. These large spines give pencil urchins a very different appearance from the fine, needle-like spines of many common sea urchins.

Is Phyllacanthus irregularis a pencil urchin?

Yes. Its placement in the family Cidaridae and its large cylindrical spines identify it as a pencil urchin.

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