Breeding stars are raised bumps on the pectoral fins (sometimes gill plates and other fins) that symbolize that the male goldfish has reached sexual maturity. Sometimes on a rare occasion, females can get them too- but also rare, some males don’t even develop them! This is NOT a good source to sex goldfish with! #bftsue #derpy #redsranchus #breedingstars #ranchugoldfish #ranchu #viral #fyp #goldfish