Sea porcupines live together as a large group, according to beach with Coral Sea porcupines. black and covered the barbed thorns of sea porcupines. trunk when exposed skin were thim would feel the pain.
Sea urchins live in large groups along the coral beach. Urchins are black and covered with thorns body. Spines of sea urchins when thrust into the skin to feel pain.
Sea urchin living together in large groups to find the coral sea urchins are black and barbed to cover the body. The thorn of a sea urchin when you poke into skin will feel pain.