Couple things in tank...

[Tommy_G]

This is VERY zoomed in, the white at the bottom is sand.... Guessing a baby feather duster?

Also got this, guessing Vermetid Snail

and lastly, growing on a spare hermit crab shell, again super zoomed in...
maybe a sponge??

 

[Tangina20]

The first picture looks like a possible aptasia anenome which is a bad thing to have in the tank. The send definitely looks like a vermented snail!

 

[Bryson.bobby]

I’m thinking the first one’s some sort of feather duster.

 

[Tangina20]

I’m thinking the first one’s some sort of feather duster.

Yeah actually you’re right i looked closer and can see the tentacles are different than aptasia sorry!

 

[Tommy_G]

Thanks for the input fellas, appreciate any and all input.

No guesses on picture 3 eh?

 

[jaxredsoxfan]

I agree, feather duster in the first- actually cool its red. Vermatid in the last 2 i believe. These arent necessarily a problem but if their slime webs land on nearby corals it can cause issues. I just pop them off the rock with a small screwdriver, but others have used superglue to permanantly seal them.

 

[Tommy_G]

Found more of the orange yesterday afternoon on a different empty shell.

Slightly concerned, these were shells added to the tank. They were rinsed in salt water (from a water change) for a couple days before adding. But I didnt scrub them or anything like that.

Anyway, I doubt that its something that came in on the shells, but thought I would mention it.