Please Id These

[SigPiPup]

The first two are of something that just appeared out of nowhere. It doesn't look like anything because it's body actually matches the coraline that is growing on my rocks. The two pictures show that it does in fact move, albeit slowly.

The third looks like mushrooms, but I don't think they are. They are hard and brittle.

The fourth is just one of the groups that is growing in my tank, quite rapidly I might add. When disturbed, they retract back into their tubes.

Please Help :help:

 

[cam191919]

i think the first one is a chiton, if you have acrilic, i would take it out. dont know the rest

 

[Amphiprion]

Chitons, a type of foliose coralline algae, and colonial hydroids.

 

[SigPiPup]

Thanks. Anything wrong with having these (obviously not in regards to the coraline)?

 

[Amphiprion]

Hydroids aren't too good, but they usually go away on their own when nutrient levels decline.

 

[cam191919]

iv heard chitons can scratch and even dig holes in acrilic tanks

 

[fish guru]

yeah, I also heard that chitons will scrape away at the silicone sealant on the glass tanks...... im not sure if it is true though. I would remove it anyways.... The second is a type of corraline algea, which is harmless, and the colonial hydriods will go away if you are doing regular water changes.