10/06/2026
Allow me to introduce Netrani’s radiant sea urchin
This is Astropyga radiata
It's a sea urchin with insanely bright warning colours and iridescent blue spots.
It’s a nocturnal algae grazer, scraping seaweed off sand and rubble and helping stop it from overgrowing nearby corals, so urchins like this quietly support reef recovery.
Nerd fact: Astropyga comes from Greek for star and buttocks, named because of the star‑shaped pattern around the urchin’s butt !!
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