I have
tiger barbs and
cherry barbs and they are big pigs (but it could be preggers)! Its probably just fat! Im sure your feeding it better than the place where you got them from. I have a tiger barb and a cherry barb that looks
just like yours, fatness wise. The others are not as fat as they are. They got that way after a few weeks here. Hehe! They are always hungry and act like they are starving, scarfing down
anything and everything! They are quick! But if you end up with baby barbs then you know it was preggers. Oooo, suspense!
As for the redness it
could be from getting picked on but do keep an eye on it to see if it gets worse. How long has it been red like that? They do tend to pick and nip at each other as well as other tankmates

Poor cherry barbs sometimes have their dorsal fins all ragged from getting nipped by the tiger barbs! They are agressive little guys sometimes! Like a little mafia with fins!
