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You've got at least two (probably three) kinds of sponges there, at least one of which is a Pineapple Sponge. All should be harmless filter-feeders. I believe the tubes in the back are also sponge, but you could touch one and find out for sure (soft = sponge, hard = not sponge).
ThanksI see pineapple sponges. Vermitids are not clear so I’d say tunicate or some sort of tube worm.

Thanks I’ll take a closer look during a water change next weekYou've got at least two (probably three) kinds of sponges there, at least one of which is a Pineapple Sponge. All should be harmless filter-feeders. I believe the tubes in the back are also sponge, but you could touch one and find out for sure (soft = sponge, hard = not sponge).
Hey. It’s the iPhone 15Such resolution! What camera is that?