identification please

Hi

today i found this 2 creatures walking on my tank glass.


Thanks
Sherif

 

Probably some kind of flatworm, but not to familar with them.

 

Looks like flatworms to me too but I'm not sure what kind.

 

is it good/bad ? do i have to remove it ?

 

ive never actually delt with flat worms but heres a prety good info site on them hopefully it will help you out

http://www.rzuser.uni-heidelberg.de/~bu6/flatintr.htm

 

doesn't look like a flate worm to me.....

do they have a shell..? its it white..? and do they ever move?

By the pic they look like nurseries sails.... I've had a few hitch hike in my sys. before

 

Doesn't look like a flatworm to me. Looks more like a chiton, might also be a limpet.

Limpets usually tend to be bad as they can eat coral tissue and chitons are harmless herbivores.