Sea Urchin Wear Shells Like Hats So Aquarists Made Tiny Hats for Them To Wear Instead
There are 950 species of sea urchins living on seabeds, making them one of the most widespread and common echinoderms in our oceans. They’re often called the “porcupines of the sea” because of their long spines that deter hungry predators. However, the marine animals are also prone to covering themselves with stones, shells, rocks—and even tiny hats. Biologist Morgan Kester recently shared this discovery on social media.








































































