I brought 6 neon tetras 2 weeks ago turned out there were 8 in the bag when I got home. When they were in the fish shop they were very small and skinny and did not look like they had been fed for a while. Now that I have brought them home I have been feeding them frozen and flake food. Today they got there first live food which was bloodworms. When I looked in the tank about 2 hours after feeding them I saw that their bellies had gotten huge, none of the other fish in the tank have gotten big bellies on them. When I got the fish home they brightened up in colour and at the minute they are still very colourful and active. I wanted to know is this an illness they have or do they just have full stomachs from Tom