small jellyfish looking things

[mike19881956]

Hey
I noticed when i turn on my lights like in the moring there aee these smalll what i can only describe as jellyfish looking things all over the glass. After the lights are on for a while they go away. Whats the dealio?:notsure: :thinking:

 

[ekclark]

also check out flatworms...bang did a big thread on them a few months ago.

 

[yellowtail]

how do you get rid of hydroids.............my sweet pods