The photograph below is of the oral area of a regular sea urchin. The most important external organs are the tube-feet (tf). These are cylindrical tubes terminating in a circular sucking disc that are ...

“I love the taste of urchin when it’s really good,” Sloan says. “You start with sea salt, then you get a big iodine hit, and, at the end, a distinctive sweetness that sits in your mouth ...

When it eats its preferred meal of a tasty purple sea urchin, it first pushes its stomach out through its mouth, then slurps everything back in to digest. “Then when they are done, they push the ...