hitch hiker id

Hey everyone, Just recently set up a new reef tank with some live rock and noticed this little guy. Shaped almost like a virus cell or an egg sac, you can see it has attached itself to the rock with multiple tendrils to hold it in place, does anyone know what this is? Maybe a sponge? If you...

So this little anem came in on my seaweed for the refugium. No clue what it is (a condy maybe) looks brown in regular light glows red in blue light. Really just no clue. Very long tentacles.

I see multiple things on my glass, my tank was empty for over a month except for all my inverts (no coral just hermits and snails) and I just added some new fish and noticed all these weird critter/things on my glass. Any idea what they are? I’ve had tiny little white worms on my glass for...

Hello guys, I’m new to reefing. Can you help me ID these things; that long tentacles; those white spots on the glass (I think it’s hydroids); these white hair on the live rocks; that thing on the edge of the rock (I think it’s a pineapple sponge). And can you tell me if they are bad or...

Hey everybody! I have an interesting critter to ID. It’s obviously some sort of filter feeding hermit crab. Does anyone know what it is or have any more info on it?

Hi All - was doing my usual Chaeto trim and found a couple critters, any idea on this one?

Not sure how to best describe it, so I uploaded some pictures. Had the mushrooms for a while now and just noticed this thing growing next to it. Tenticles and it glows in the light. No idea what it is or if it should be removed? Appreciate the advice in advance. Happy to take move pictures...

Any idea what I’m working with here? It’s on the glass and there’s nothing similar on/near my montis. Looks almost like a berghia to me, but I’ve never had them. I’ll try and get a better photo of the top.

TLDR: How should I proceed in dealing with this tank now that I know it has parasites but have no idea what they are? Objective: obtain a species ID(s) of the shape/color changing flatworm-like creatures. Pertinent details: similar (but not identical) infestation's crashed 2.5 of my previous...