Does anybody know what his is?

[blackout12]

Can anybody tell me what this is growing between my candy canes? It shinks up whenever i get near it. I have no idea what it is. Thank you!

 

[smtank]

I am going out on a limb and guess a Tunicate of some sort. 90% chance I am wrong, the images is just too blurred to make anything out.

 

[eb2292]

I have the same things on my trumpet corals. They're harmless pineapple sponges.

 

[blackout12]

I have the same things on my trumpet corals. They're harmless pineapple sponges.

I dont think this is a pineapple sponge. I have seen them all over my tank and none of them look like this. Its one actually seems like a worm or something living inside this thing. When I wave my hand close to it, it shrinks up. I have no idea what it could be. Lol