These systems are capable of self‐assembling into diverse structures such as chiral nanotubes, mesoscopic clusters and even giant sea urchin‐like architectures.

Watch the clip, then read on to discover exactly what is happening and why the fish finds the sea urchin so tasty. Sea Urchins on the Sea Floor Sea urchins’ mouths have five teeth.

Beneath sea urchins’ exterior spines, rounded skeletons called tests are jewels of color, texture, and symmetry. There are hundreds of urchin species, and they’re found in every ocean on Earth ...

Hōnaunau Bay, Hawaii on 25 January, 2020. Sea urchin populations are ballooning in the bay, putting the coral reef at risk, a new study has found.

Purple sea urchins, beware: There’s a purple urchin-eating predator on the horizon — and its name is the sunflower sea star.