What do you do for your glo fish if it is pregnant?

Glofish can not become pregnant. They may become plump with eggs but they are not pregnant as that implies they are carrying fertilised young that they will give live birth to. The eggs are not fertilised until spawning occurs. Technically it is not legal to deliberately try and breed Glofish as they are trademarked. They are genetically modified Danio Reira (Zebra Danio), a common aquarium fish with pigment genes added to them. Sometimes it can be pretty hard to stop your fish from spawning though- especially with DaniOS as they are prolific breeders in an aquarium. Usually the Danio eggs will be immediately consumed by tank mates and the parents themselves so very few fry emerge. People who try to breed Danio typically put the fish in a tank full of marbles (and no other fish/snails). During spawning the eggs fall into the cracks between the marbles where the fish can't find and consume them. Once spawning is complete the parent's are removed from the tank. Once the eggs hatch- they young fish can be fed newly hatched baby brine shrimp, crumbled boiled egg yolk- and as they get slightly bigger- Walter worms and Micro worms and crumbled flake food.