What’s this bright orange thing on my leather?

[lukefish]

Just got this leather and noticed there is a bright orange “thing” attached.
Any idea what it is?

One more attempt at a photo

 

[monkeyCmonkeyDo]

Im gonna say sponge. Pretty kool.
D

 

[EJReefer]

I think that I have one of those on my lobophylia.

 

[Soren]

+1 possibly a sponge, but it may also be a tunicate. If either of these is correct, it is probably harmless and an interesting addition!

 

[lukefish]

+1 possibly a sponge, but it may also be a tunicate. If either of these is correct, it is probably harmless and an interesting addition!

I now have to google tunicate! Hahaha

 

[lukefish]

+1 possibly a sponge, but it may also be a tunicate. If either of these is correct, it is probably harmless and an interesting addition!

Having looked it up, I hope so!!

 

[monkeyCmonkeyDo]

I was thinking tunicate.originally. another good guess.
D