Priest-Hat Urchin?

[Brent F]

Does the urchin on the right look like a Priest-hat urchin? If so, should I remove it from the tank?


Info on Priest-hat urchin:

http://www.saltcorner.com/sections/z.../Tgratilla.htm


Common Name: Priest-Hat Urchin
Species Name: Tripneustes gratilla (Linnaeus, 1758)
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Range: Indo-Pacific Ocean: Red Sea to Hawaii
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Natural Environment: Inhabit reef rock and rubble areas covered in algae
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General Husbandry: Has a temperature range of 72 to 83°F (22 - 28°C). Body size is about 4 inches (10 cm), with very short spines. Consume huge amounts of algae, however, toxic to the touch! Avoid this species!