Puck the Sea Urchin has a very funny story. He was left over from a reproduction lab (note: the urchins WERE NOT HARMED in any way, we were simply discussing their reproduction habits). Anyway, my lab instructor didn't have any use for them afterwards, so she let me take home the one I had taken a shining to--enter Puck. Now, I've had aquariams my whole life, but I am now stepping into the realm of salt water aquariams. I've tried looking up information about sea urchins, but most of what I have found has been one academic instructional article about how to conduct in vitro fertilization and a whole lot of information about how best to eat them (which I definitely don't plan to do). Now, I'll go ahead and say he's lost some spines, so I need to start addressing that right away, but again, I'm less than a novice. Any and all help is welcomed and appreciated!