Newbie here, this showed up near a rock this morning. Multiple strands (at least 6) of what looks like very thin hair (much thinner than any aptasia I’ve seen so far), coming out from a center under the sand, can’t see the “head.” Tentacles are up to a couple inches fully extended, touched the nearby GSP which didn’t seem to care. Then fully retracted and hid. They are moving independently, curling and exploring, so I assume it’s some kind of animal. Should I keep or try to kill? Please help, thanks!