How long is a feeder fish pregnant?

Many different species of fish are used as 'feeder fish'. Some are egg layers and some are livebearers. If you say what the species is you will probably get an accurate answer.

1week

up to as long as 4 months some fish only 3 months and they usually they will died after laying eggs

Fish can't be pregnant Most of them aren't. There are a few exceptions (sharks, seahorses..) but most of them lay eggs. Methods vary, some species fertilize the eggs after they're laid(salmon for...

While the gestation period is often about 28 days, it can range from 21 to roughly 40