yea many people dont relize that fish have what is called a larve stage. While it is not an acctual larve like an insect would have, it is vary different from the acctual fish. My cichlids dont swim in their larve stage, just wiggle around on the ground. I think it is similar to any baby animal, but a lot more extreme. Guess it has something to do with fish being less developed than other "higher" animals.