Ok im a rel noob, and are playing online. My newborn fish are just loosing health really fast and i dunno what i can do to help them. I've tried feeding them but that doesnt help, what can i do?

Sometimes, if you feed them it will make them worst. Overfeeding can cause health to decrease. But if they are decreasing before that as well, I would say research Fish Environment, but because you're on the online game, you cannot do that. So basically there's nothing you can do, just don't feed them too much!
Hope that helps, Becky.

Thanks:) i'll just send them my happythoughts

you can buy that purple bottle.
It will temporary boost their health.
Just in time to sell them

If you breed a level 2 or 3 fish while your research environment is at level 1, they will keep getting sicker and eventually die.

Yes, that would be why!

uhave to reserch inviroment and food that worked for me ^^

it appears, though, that some of the baby fishes whose health decline are the same breeds as the adults - i have gotten to food and environment level 2, have temp regulator, air, and 2 of the plants (food and health) and yet they still fade away.. are there any other supplies that help??? the vitamins seem only marginally helpful..

Are you sure that you're not overfeeding your fishies? If you feed them before their fed meter is about half depleted, you'll decrease their health with each feeding.