Baby Astaeas???

definitely flatworms, look up flatworm exit.

 

well i actually think they are a harmless type because they are not the red ones like on meleev's reef. I might just get a 6-line wrasse and have him go in and eat them, then move him to my 55g FOWLR because the flatworm infestation is in a 6g nano

 

i had whitish flatworms that kind of waxed and waned depending on the film algae on my glass.

 

well the brownish red ones are bad for coral they cover the coral and steal its lite and those kinda look just like that one six wrasse would not put a dent in their population as there are most likely thousands u dont see

 

+1 dude. on top of that you CAN use flatworm exit but when the population of the worms are that great and you kill them, they release toxins in the tank witch at that great a number, can nuke your tank!

 

I had this kind of flatworm, the tan ones, not the red ones, with the simple profile. I panicked and FW exitted the tank, it killed a lot of them, but didn't end up killing all of them.

They eventually went away on their own, I don't see any anymore.