We got a 5.5 gallon freshwater aquarium when our son won a goldfish at a school carnival in April. We bought a Platy and a couple guppies to add too at the advice of the pet store. Last week, I went and bought a new guppy to replace one that died. I noticed after we got home it looked bloated. Did some research and determined it was pregnant. Went back to the petstore and they sold me a net thing to quarantine the pregnant fish in the tank. I did that and this morning, she started having babies. She is apparently voracious though, because she was swimming around trying to catch and eat them in between delivering them. She did eat some. My husband finally said we should put her with the rest of the fish before we end up with zero babies. It looks like we have 10 babies that didn't get eaten (though some haven't moved) and she still had a black spot, which probably means she's still pregnant and will eventually deliver the rest with the other fish. I'm really just at a loss of what to do.