2 things to I.D (pics included)
Ok, first off, we have this beautiful white thing that resembles a sponge, a very small white translucent sponge with 2 long, thick tentacles protruding from it. The tentacles have grown about 2 inches in a week. I have no idea what it is, it is growing on the rock by a mushroom. (picture 2)
The other thing is a sponge like substance with on raised hole coming out of the centre. It is red in colour and growing on the rock, there are a few of these.(picture 1)
Don't tap on the glass, the fish will think you are stupid!!