![Priest-Hat Urchin or Short Spine Urchin, Tripneustes Gratilla, South Africa Stock Photo - Image of length, gratilla: 195881094 Priest-Hat Urchin or Short Spine Urchin, Tripneustes Gratilla, South Africa Stock Photo - Image of length, gratilla: 195881094](https://thumbs.dreamstime.com/z/priest-hat-urchin-short-spine-tripneustes-gratilla-south-africa-195881094.jpg)
Priest-Hat Urchin or Short Spine Urchin, Tripneustes Gratilla, South Africa Stock Photo - Image of length, gratilla: 195881094
![Purple sea urchin (Sphaerechinus granularis), on reef. Sometimes the short spines are purple, Stock Photo, Picture And Rights Managed Image. Pic. UIG-961-24-KGH00230 | agefotostock Purple sea urchin (Sphaerechinus granularis), on reef. Sometimes the short spines are purple, Stock Photo, Picture And Rights Managed Image. Pic. UIG-961-24-KGH00230 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/b4bfab2163d9ffb2be5951735e047207/uig-961-24-kgh00230.jpg)
Purple sea urchin (Sphaerechinus granularis), on reef. Sometimes the short spines are purple, Stock Photo, Picture And Rights Managed Image. Pic. UIG-961-24-KGH00230 | agefotostock
![Loving my new short-spine urchin for algae control. Bonus jealous damsel in the background. : r/Aquariums Loving my new short-spine urchin for algae control. Bonus jealous damsel in the background. : r/Aquariums](https://i.redd.it/1e1bnxblomwy.jpg)