Are Sea Urchins USING TOOLS?!

Sea urchins are fascinating creatures that use various items from their environment for different purposes. Depending on the species and habitat, they may use these items for sun protection, wave resistance, predator avoidance, or even as a food source. Studies have shown that these behaviors could be considered a form of tool use, highlighting the adaptability and intelligence of sea urchins.

In what way do Antarctic urchins use coverings to protect themselves?

What unique behavior does the Kina urchin exhibit regarding its collected items?