Just for fun

[Delta1389]

I'm pretty sure this creature is harmless and just some form of tube worm. But let's see if anyone can make a positive ID on them just to be safe. They mostly only grow on the underside of my rocks where they get little to no light. They don't seem to be multiplying rapidly. I noticed that's particular ones maybe a month or so ago.

 

[cmcoker]

Pineapple sponges, harmless

 

[Untamedrose]

seconds pineapple sponges.... I've got them harmless