Here are a few pics of my goldfish and Zebra Danios. Had two fantails at first then the calico one died. Now I just have the orange fantail and 4 Zebra Danios.
Cute goldie. Now that I see the pictures, that black is definitely healing from ammonia burn-- not to worry. With good water, everything should be fine. Danios are pretty little fish, too, but a little bit psycho.
Thanks, I hope the poor guy recuperates okay...plenty of water changes will hopefully help. And yes I have been watching the Danios for a few hours now and they are so fascinating to watch...The goldie also seems to be joining in their frantic fun