male or female

Question
how can you tell weather your fish is male or female before they are old enough to breed?

Answer
Hi Beth,
Thank you for your questions. Some species there is no way to know. That's a good question for the sales staff at your local aquarium supply shop. They are the experts in the species they sell.
Here is my guide for holistic aquarium care that might save you some time and energy. Please print it out for future reference.
http://steamboats.com/aquarium.html
Write back if you want to discuss further.
Nori