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Tuxedo urchin (Mespilia globulus)
AI illustration, not an ID reference

Tuxedo urchin

Mespilia globulus

InvertebratesSaltwater

Care level
Easy
Temperament
Peaceful
Reef safe
Yes
Recommended tank
150 L
Maximum size
8 cm
Temperature
24–27 °C
pH
8–8.4
Diet
Herbivore

Care at a glance

The tuxedo urchin owes its name to the alternation of short spine bands and smooth blue-black fields, giving it a smartly dressed look. It stays considerably smaller than most urchins, which makes it suitable even for a medium-sized reef tank.

It grazes algae off rock and glass day and night, which makes it one of the most useful clean-up crew members you can have. It does like to decorate itself with anything loose: small coral fragments and even bits of decor end up on its back.

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Values are mainstream hobbyist guidance, not gospel — always watch what your own animals need.