Pink growth on frag

[alsante]

Does anyone know what the pink growth is on the frag plug?

 

[Troylee]

Hard? corraline if soft a sponge..

 

[shakacuz]

Hard? corraline if soft a sponge..

this! or, if it moves...flat worm! haha

 

[alsante]

Hard? corraline if soft a sponge..

Ok so it’s a sponge, thanks!