Amazon, pea, Schoutedeni, are all comparable and full fresh water. There are more, bigger like mbu, fahaka, and smaller obviously pea are one of the smaller ones.Aquarium co-op has some really good videos on the subject on you tube. I believe he said pea puffers are the only fresh water puffers.
I really like the color on green spotted puffers by any chNce is there a puffer that looks similar
My lfs can get colomsesus asellus in for 5$ is that a good deal and would they get along with discus