Hydra in Cichlid Tank

[Aquaninja]

I read a little about Hydra, and I guess they can sting things like little shrimp, but I have Cichlids only (aside from all the little snails). Will the tiny little Hydra sting my fish? Also, if fish breed will the Hydra sting the babys?

The fish are 2 Kribs, (1m1f) and 3 Brichardis (no clue what sex)

[Hollygirl]

Hydra can sting and kill fish fry. The tinier the fry, the more vulnerable they will be to the Hydra attack.