#echinoidea

[snototter]

A Savigny's Longspine Sea Urchin (Diadema savignyi) in Batangas, Philippines

by Robin Gwen Agarwal

[spongerard]

Bouba and Kiki as Black Leather Sponge Sarcotragus spinosulus and Atlantic Purple Sea Urchin Paracentrotus lividus

[every-day-creechur]

Long-spined Sea Urchin Diadema antillarum

Found in the western Atlantic and Caribbean. It is the most abundant and important herbivore on the coral reefs of the western Atlantic and Caribbean basin. When the population of these sea urchins is at a healthy level, they are the main grazers which prevent algae overgrowth of the reef.

image by Cricket Raspet

[jadeseadragon]

📷 Anders Hallan

Sea Urchins

[life-on-our-planet]

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

[saritawolf]

Eccentric Sand Dollars (Dendraster excentricus) - (c) SaritaWolf - please do not repost

[resedaluteola]

More sea urchins - forever in love with the fragility of their bodies beneath the spines.

(04.2025)

[se9ua]

Buscando erizos de mar en pozas intermareales por la península de Cavancha, Iquique.