What are some types of Freshwater and Saltwater Fish can i purchase cheap or find in a nearby pond?

Question

i am doing a science fair project "can saltwater fish survive in fresh water? visa versa" and i need to get some fish....n e suggestions???

Answer 1

cheapest saltwater fish will be damsels, fresh water fish are cheaper all around mollies will be good because they can survive in saltwater and then platies can not for very long. your saltwater damsel fish are the cheapest by far but will cost about twice what the freshwater fish do. Some fresh water fish can survive in saltwater and some can't so don't just try one kind mollies, columbian cats, freshwater puffers all can survive in both. But a lot of kinds cannot like goldfish, chiclids, plecos. Any fish listed as brackish water can live in either.

Answer 2

Um, listen up, you can NOT put a saltwater fish in a freshwater tank and vice versa. You don't need to do an experiment with it, it's just plain fact. You will KILL a fish that you put in this situation, and that wouldn't be a very good science project, would it?

The ONLY thing I can suggest to you is to get a brackish water fish, like a molly, and increase the amount of aquatium salt in its water from none to 1tbsp per 3 gallons, over a month or however long your project will last. They are one of very few fish that can adapt to fresh water, brackish water, or salt water.

If your teacher insists on you doing your original project, tell her it is animal cruelty. Because it is. It's like saying "I want to see if a kitten can survive under water"

And for Pete's sake, do not take a fish from the wild. That is illegal.

Answer 3

Zoe pretty much has it. I do not know of any saltwater fish that are known to survive in complete freshwater. Again, brackish would be your best bet. For what it does matter, a local fish store holds guppies in their saltwater system apparently without problem. I tried with some in a nano tank just for curiousity, slowly increasing the salinity.... but I stupidly didn't mesh the intake on my filter pump. :( Needless to say, I never found out if guppies can cross-over easily or not.. Do NOT just sacrifice fish by tossing them back and forth in and out of saltwater and freshwater. Freshwater dips are ok for saltwater fish, but I do not believe that much more is tolerable. Also, PLEASE use established tanks. This experiment if pointless if the tanks would kill off fish that were in the correct water type. Salt water tanks are NOT plug-and-play. They must at least cycle first... and it makes me nervous not to go into any more detail (PLEASE see the link below). Freshwater tanks are the same, but slightly less severe. In either instance, use dechlorinated water and know what you're doing. For information on keeping freshwater, saltwater, and even brackish systems, I would refer you without hesitation to www.WetWebMedia.com . This site has not only provided me witht he knowledge to set up and maintain my salt water systems, but it has the best reputation and largest sources of information and FAQ's that I know of. In the least, search the site and see if people have commented on their attempts. Good luck, but no sacrificing fish by ignorance, please.
Ken.

Answer 4

guppies. cheapest fish around.