Aiptasia or something else?

[Tarabelle]

I’m not sure what on the hermit crab’s shell. I’m hoping not the dreaded aiptasia…… also what are these white things appearing on the rock?

Thanks in advance for helping out a novice.

 

[ISpeakForTheSeas]

Feather duster worm on the hermit, and pineapple sponges on the rocks - both are harmless filter feeders.

 

[Tarabelle]

Feather duster worm on the hermit, and pineapple sponges on the rocks - both are harmless filter feeders.

Thanks so much! Whew this tank is like being a first time mother…. lol thanks for the support

 

[Sophie"s mom]

Yep, pineapple sponges for sure! Just filter feeders that will eventually go away as the tank matures. But harmless in the mean time.