Sep 25, 2025
A Savigny's Longspine Sea Urchin (Diadema savignyi) in Batangas, Philippines
by Robin Gwen Agarwal
seen from United States
seen from Mexico
seen from China
seen from Canada
seen from Germany
seen from Russia
seen from United States
seen from Malaysia
seen from China
seen from United States
seen from United States
seen from United States
seen from United States
seen from United States
seen from China
seen from United States
seen from United States
seen from United States
seen from China
seen from China
A Savigny's Longspine Sea Urchin (Diadema savignyi) in Batangas, Philippines
by Robin Gwen Agarwal
Bouba and Kiki as Black Leather Sponge Sarcotragus spinosulus and Atlantic Purple Sea Urchin Paracentrotus lividus
📷 Anders Hallan
Sea Urchins
The kelp's holdfast, its crucial attachment to the rocks, is incredibly tough. Each sea urchin has five teeth, which are self-sharpening and are replaced every few months. With them the urchins fell vast areas of kelp, creating clearings known as "urchin barrens". BBC | Planet Earth
Eccentric Sand Dollars (Dendraster excentricus) - (c) SaritaWolf - please do not repost
More sea urchins - forever in love with the fragility of their bodies beneath the spines.
(04.2025)
Buscando erizos de mar en pozas intermareales por la península de Cavancha, Iquique.
Sand dollars, the currency of the Sea
Yet another simple creature that can be found shifting through the sands. Again, watch where you step.
Unidentified, Superorder Luminacea
15/06/22