Breeding for profit is hard and for someone your age it is nearly impossible unless you meet some very hard to get criteria. The main ways to make profit are as follows.
1. Breed something that is rare and hard to find.
2. Breed something that is very hard to breed.
3. Breed in bulk.
None of those are viable for you except for potentially 3. I will explain why now.
1. If it’s rare then it most likely is very expensive, you are 14, you do not have the money to get enough breeding stock of rare fish.
2. You do not have any experience with breeding fish or not enough to even attempt this. There are people that have been trying to breed a species for as long as you have been alive or longer and still haven’t managed to breed them.
3. Bulk requires space yet just about anything can be profitable if need in large enough bulk. Guppies for example can be profitable but in order to make them profitable you would essentially have to take everything out of your house and use the whole house for nothing but guppy breeding.
3.1 the only chance you have at making a profit (a true profit, that is after taking in the costs for everything ie food, water, electricity, tanks, etc) is breeding shrimp. You won’t be able to keep the operation locally for long as not everybody want shrimp and the market will be over saturated before long so you’ll have to sell online if you wish to keep selling although that brings its own problems such as shipping and shipping costs. There are thousands of people who ship shrimp who all have more experience with shipping live animals than you. Why should people buy from you? You’re a nobody. Bob here has been in business selling shrimp for 10 years, he charges less for the shrimp than you, and the shipping costs are lower as he has is a repeat customer of the shipping company and has gotten better rates from them than what they offer someone who is just beginning to ship with them.
In short, there is not a high chance of you making a *true* profit although you might be able to get some fish food or get a few fish every now and then. Would I try to breed for profit as you? No. Would I do it for fun? Yes if you are interested in the species.
twentyleagues
didn’t you breed mbunas as a kid? Wanna tell your story?