Does anyone know if Zebra Danios have a tendancy to jump?????? I was just waking up this morning when I heard a little splash from my aquarium. I figured one had just jumped but didn't think much of it cause my tank is covered. I get up to feed them and there is only 3 in there out of the usual 4. I coulnd't find the 4th one ANYWHERE! I have a small opening at the back of my tank, last night I did a water change and filled up the tank nice and full. I guess the little guy took a leap of faith and succeeded! I feel SO bad though!!!!