''Heterocentrotus trigonarius'', commonly known as the slate pencil urchin or red slate pencil urchin, is found in the tropical waters of the
Indo-Pacific
The Indo-Pacific is a vast biogeographic region of Earth.
In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the ...
region.
''
Heterocentrotus mamillatus'' is a similar, related species.
References
UC Berkeley Moorea Biocode listingWorld Register of Marine Species listing
Heterocentrotus
Animals described in 1816
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