open wound

Hi All, I'm brand new here. My beautiful yellow dalmatian molly, Champa, has a big hole on the side. I first noticed some white mass last night. I searched everywhere and am unsure what it could be. I ordered some aquarium salt as I found that it could assist with wounds. Today, the white mass...

Please can someone help, my guppy is around three months old. He was born to one of my female guppies so I had him since birth. These last few days I noticed he was staying by himself and not interacting with the other fish. I also noticed he has a swollen belly so I wondered if he was...