"linda mar" wrote:

I was staring at my tank (again)... and saw what I
think are hydras.
they look like short white lint with fingers sticking
out one end, while the other end is anchored on glass,
gravel, plants.

Yup, that sounds like hydras. I found just two in my tank a long time
ago, which no doubt means there are more, but unfortunately I can't
see them now.

is this bad?

Not especially. While they do have a poisonous sting, much like a
jellyfish, they're far to small to hurt anything except the smallest
fish - like fry.

Hydra would be bad in a breeding tank, but in a normal community tank
they shouldn't be a big problem.


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