blood on my goldfish

Question
I have three goldfish that seem to have what looks like blood on there fins and going what to there body, then I see that my baby catfish is dead.  Please tell me what this is and what to do thank you  

Answer
If this is the same on all 3 goldfish, it sounds like its just part of them. Nothing to worry about joey. Just make sure you have no nitrate/nitrite/ammonia in the water and check your PH levels. Check to make sure the tank is below 78 degrees.

Other than that. Your fish should be fine. As far as what killed your baby catfish, without any symptoms I wouldnt know. Start by checking your water

Andy :)