I've noticed over the last month or so that my gold Danios have ALL lost a lot of weight and their spines have become bent. There were 3 but 1 died yesterday. I originally used these 3 along with 4 zebra danios to cycle my tank back in October. Recently 4 of my guppies as well as my male GouramI have all went missing never to be seen again. When the guppies disappeared I thought maybe my Angel had maybe killed them and the fish had a feast afterward since the guppies like to sleep in a bush near the angels staked out territory. My angel is now fully grown so I was prepared for some aggression but he has not shown any aggression toward any of the fish except my male gouramI that disappeared. My male gouramI usually chases the female around but never really nipped any fins, it just seemed like the game that they play. As my angel got bigger it seemed like he wanted to get in on the fun but he can't make those quick turns like the Gourami. The angel would usually only bother the male. Now that the male is missing ( presumed dead and eaten ) the angel chases the female around but doesn't hurt her. Ok back to my original question about the gold danios possibly having TB. I set my mind to euthanize them just in case they are infected but I want to know what the forum thinks is wrong with them. ALL questions and critiques are welcome. I'm having a problem uploading the photo.