Need ID. Hitchhikers on recent pickups

[gsepanik]

 

[MoshJosh]

Little brown rolly polly dudes look like chitons to me.

The yellow blob is too out of focus for me to ID.

 

[gsepanik]

Chitons are beneficial CUC correct?

 

[ISpeakForTheSeas]

Chitons are beneficial CUC correct?

Yes, and they look like chitons to me too. I'm guessing the yellow thing is a sponge (generally harmless/beneficial unless they're growing over your corals).

 

[WheatToast]

Yes, and they look like chitons to me too. I'm guessing the yellow thing is a sponge (generally harmless/beneficial unless they're growing over your corals).

+1. The sponge might die back since it has been exposed to air, though hitchhiker species often manage to grow back. The chitons will graze on algae.

 

[gsepanik]

Thanks for your responses. I looked up chitons and I assumed that the yellow thing was a sponge, but I pulled it off prior to putting it in my tank. Kind of upsetting cause they’re really neat but it was growing between the heads of the acan. Probably for the best