Purple growing on hermit crab shell

[HKHAIR]

Any ideas what the purple thing growing on the hermit crab shell?

 

[Devan Patel]

i dont think its corraline, but nothing you should worry about

 

[ISpeakForTheSeas]

Looks like a sponge to me.

 

[Cnidaria]

Any ideas what the purple thing growing on the hermit crab shell?

I agree it looks like Sponge.

 

[vetteguy53081]

Any ideas what the purple thing growing on the hermit crab shell?

very pretty and are tunicates which are hitchhiker filter feeders

 

[HKHAIR]

Thank you guys, I was also thinking some sort of a sponge.