ID, sponge/Tunicate/Coral?

stewielouie86

New member
Hello all.
I am new to the forum and fairly new to reef tanks. We have a 3 month old salt reef tank, it is a 26 gallon bowfront. All nutrients are where they need to me as well as temp and salinity. It is pretty stable for a new tank from what I understand.

Within the past 2 weeks I noticed a yellow bubble. It has been growing daily. It does not appear to be algae. It is always in the same spot, directly in front of the flow that returns into the tank from the sump. I have attached the most recent pictures I have. It does not have 2 holes in it like most tunicates i have found online. it has a green tube that extend out from it. Can anybody ID this? I have searched forum after forum with no luck.

Thanks!!!
 

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