Back then long spine sea urchins were everywhere and my memory is that we were lead to believe it was a problem and feeding them to the fish was encouraged. That was also at a time that we carried big old dive knives. Would not try that now with the iddy biddy knives we carry today. I also remember hugh tracks of elk and stag horn corals at most shallow sites right off 7mb which are mostly gone today. Sorry don't remember Sweet Lips.