Found this little fella on the back of a GSP I got from a LSF. It survived a pretty strong dip, it is in some sort of tube structure and has little feather like things on it. Sorry for the poor photos but if I turn the lights up it hides and it’s in a horrid spot to get a video or photo of. I’m new to reefing and just want to make sure there isn’t something bad hanging on. Thanks heaps!