I've been growing out some mosquitofish fry in my 20 gallon, and it got me thinking. What is the smallest fish in the aquarium hobby that you have either owned or know of? I love the sight of the little babies shoaling together through the plants. It's really peaceful seeing such tiny fish shoal together. And they don't touch the shrimp because to them the shrimp are giants. But mosquitofish grow and they will have to be moved to the pond in the future. Are there any fish that stay that tiny their whole lives, or similarly tiny? Thanks.