Anybody know what these are?

[Brekett]

Hi guys, just started cycling my 20G aquarium with cured Live Rock. After a few days, I've noticed these guys. Is one, or both of them Aiptasia? Thought the bottom, brown one might be. They both react to light somewhat but generally don't completely retract. If it is Aiptasia, should I deal with it now or wait until the tank has cycled?



Also, one of my rocks is starting to develop this white fuzz in a few places. Reading around the web, it seems it might be a sponge or a fungus. Anybody got any more of an idea and should I be worried?



Thanks, in advance!

 

[Kristy3693]

Yup, I think it is. I would get rid of it now, syring with lemon juice. Stab it and inject it.

 

[Kristy3693]

Not sure about 2nd pic. Looks like a sponge to me also.

 

[Brekett]

Thanks for the ID. Do you think they're both Aiptasia, or just the bottom one?

 

[Sniperhank]

Top pick you have 2 aiptasia on the rock. The bottom one I'm more sold on it being something else, just keep an eye on it.