Weird algae?

[theinnkeeper]

One of my tanks has a bunch of these things on the walls. They're white/beige/clear around 4mm-7mm. They kinda flop around with the current. I first noticed them on the Almond leaves now they are all over the side of my tank. It's really hard to take a clear photo of them so I did my best to draw them. Of them either "caught" a little worm or it got stuck to it and can't break free. Can anyone tell me what these are? Sorry for the picture

[christhefish]

that looks like hydra
they can eat fry but are usually safe with larger fish

[theinnkeeper]

After googling, they are indeed hydras. thank you very much

[neven]

they can also hurt shrimp if the colony is weak

[theinnkeeper]

Need to get some Fenbendazole LOL

[Ursus sapien]

or spixi snails, which eat hydra. typically, though, hydra colonies die out on their own in the absence of micro crustaceans.

[theinnkeeper]

wtf.. Canada doesn't allow you to buy anything with Fenbendazole without prescription. USA!