Mysterious yellow sponge/worm looking creature

[djc9364]

Can anyone please help me identify what I have growing throughout my reef tank? Are they going to become a problem? If so, does anyone know of a natural predator that would be reef safe?

 

[ISpeakForTheSeas]

Looks like sponges to me - harmless filter feeders. If they start growing out of control or smothering corals, they're usually pretty easy to trim back/remove. A lot of people consider them a sign of a healthy tank.

 

[monkeyCmonkeyDo]

Yellow.sponge.
Turn the whites up.
Lol
D

 

[djc9364]

Looks like sponges to me - harmless filter feeders. If they start growing out of control or smothering corals, they're usually pretty easy to trim back/remove. A lot of people consider them a sign of a healthy tank.

Good to hear! Thank you

 

[vetteguy53081]

Can anyone please help me identify what I have growing throughout my reef tank? Are they going to become a problem? If so, does anyone know of a natural predator that would be reef safe?

These are Tunicates which are reef safe filter feeders

 

[WheatToast]

Looks like sponges to me - harmless filter feeders. If they start growing out of control or smothering corals, they're usually pretty easy to trim back/remove. A lot of people consider them a sign of a healthy tank.

+1. Tunicates have less irregular growth patterns and should immediately contract when disturbed, unlike these sponges (probably a species of Clathrina sponge):