does hydra mean eggs?

I have a planted 10 gallon w/ three cherry barbs and two oto cats. I
recenty bought one of the otos. The day after I introduced her, she
became lethargic and swollen, barely eating. I thought she was on her
way out, since I read otos can be tough to acclimate to new tanks. that
was about three weeks ago. She is still around and seems healthy, but
still swollen. Now I am noticing hydra reproducing in the tank, I had
never seen them before. I do not feed any live foods, only flake for
the cherry barbs. Does this mean the oto is scattering eggs. It seems
logical, any suggestions?