How to distinguish female goldfish from male goldfish Usually the most direct way to distinguish between male and female goldfish is to observe the excretion opening of the goldfish. Usually, the male goldfish has a long excretion opening, while the female goldfish has a larger excretion opening and is rounded for ovulation. If you put the female goldfish and the male goldfish together, usually the female goldfish is more fat, while the male goldfish is more slender. And the number can be distinguished by the tail, the male goldfish is a little wider and flatter than the female’s tail. Distinguish between male and female goldfish, you can also observe from the goldfish fins, generally curved, stout goldfish are female goldfish, and short fins are male goldfish. Male goldfish march faster, compared to the female goldfish will swim significantly slower.
