ID Help for Dad's Tank

[davehead86]

My dad has a 55 gallon tank with a pari of clowns, a goby, and an anenome. Pretty basic set-up, been running really good for YEARS. There are some things that are growing in the tank latley and he isnt sure what they are when I ask him about them. Maybe someone here can help?

In one picture there is a soft white blob on the side of a rock.
Another picture has what looks like a ton of tiny snails?
And one pic looks like there are some actual corals growing even though he has never had any kind of corals in the tank.

Help please!

 

[cloak]

The "snails" in the first picture look more like Limpets to me. That white blob in the second picture is most likely either a sponge or a tunicate. Those little polyps in the third picture might be Colonial Hydroids.

http://www.lionfishlair.com/hitchhiker.shtml

 

[C.Eymann]

1. Collinista snails?

2. Sponge?

3. Hydroids (can become a problem)