Yes,Neon tetras and catfish live together well.
Guppies, Neon tetras, lemon tetras, cory catfish (bronze), oto sucking catfish, platys etc.
small tetras, bottom-feeding catfish(NOT CHINESE ALGAE EATERS) and other live-bearers,
African cichlids, barbs, livebearers, synodontis catfish, loaches, cichlids, tetras, mailed catfish, labyrinthfish, and rainbowfish.
neon tetras barbs cory catfish
That is fine. You might consider getting some corydoras catfish.
Danios, Tetras, Barbs, Killifish, Guppies, Platys, Mollies, Swordtails, Cichlids, Corydoras Catfish, Synodontis Catfish, Plecos, Gouramis, Rasboras and Rainbowfish just to name a few.
Julii corydoras and neon tetras to even African cichlids.
catfish live in the sky and stuffz catfish live in the sky and stuffz
knife fish, tetras, knight crabs, barbs, red tail catfish ext
Neon tetras live in fresh water, not salt. So they probably live in areas of the Amazon River.
It depends on what size of aquarium you have. I have a 10 gallon aquarium and i have 7 tetreas and they seem to do fine with my green cory catfishes. They dont bother fish on the bottom hardly ever so catfish and suckers are fine. If you have a loach it may be agressive towards them just because of there size. Also beware of getting fish with long flowing fins because tetras are fin nippers. So if a fish that isnt described here is in your mind of getting and you have tetras then you can get it.