Need help, WHAT IS THIS THING!

[Brian Baker]

You can see right through them and I just noticed them last night on my tank.

Here is a video, it pulses!

 

[Crabs McJones]

Tunicate

 

[Nick30G]

Some kind of sponge/tunicate would be my guess!

 

[Ranjib]

Sponge, harmless

 

[KJ]

A+ on Tunicate

 

[Brian Baker]

So it is harmless?

 

[Crabs McJones]

So it is harmless?

Yup Harmless filter feeder

 

[Dancingmad]

Hitchhiker ID'd - Just passing by to say sweet find. Those guys look cool! That lil wiggle the mouth does is awesome - thanks for posting a video!

 

[Brian Baker]

Thanks for you help, I don't care what reef central says about you guys, you guys are alright! LOL

P.S. Will it get bigger?

 

[Cnidoblast]

https://en.wikipedia.org/wiki/Tunicate

Some really interesting reading there - they are closer to humans than humans are to corals!