02-14-2010, 05:47 AM
| || | As long as your goldfish are well structured albeit not very skinny and already sexually matured, then it is possible. See this link. Sexing Goldfish | Goldfish I tried to accurately identify the sexes by looking at vents for juveniles. Note size will NOT accurately tell you the actual age. Until they are sexually matured, venting is very tricky although I successfully identified a few by their vents after a few months raising them. If yours have vents protruding (as seen in the link above), then there is no doubt your goldies are females. Males should not have that. If you plan to keep only singletails, don't keep any fancies with them. It is especially dangerous if you combine male singletails with female fancies. They'll get slammed brutally by the more powerful male singletails and even killed. I'm fortunate that while I have fewer females in my collection, the ladies are far bulkier and bigger than the males so there is very little risk for them when they spawn. I do have a few males that are rather fat and easily mistaken for ripe females but they're really males.
Originally Posted by colley614
Thanks for replying to my post. I've read a lot of posts you have made on many forums with much interest. You really have a very wealthy knowledge of fish. Can you sex small common or comet fish as females. I've been looking at the vents on small fish and I'm sure I can see little tiny vents protruding on some fish. I stood there for a while looking at some fish that are about 3 inches, not including tales and although they were thin I swear that their vents were protruding slightly? Although my LFS is sure that they can only be sexed during the mating season? If the little protruding vent from a side angle is a sure sign then please let me know as soon as possible as there is a lovely common at the store at the moment and I'd love to buy it if I knew it was the little princess I've been looking for.