This is a very good cartoon. However, it's no longer in general circulation due to changing times--as well as folks who want to protect our kids. I find it strange that this film was shelved because it depicts smoking and advocates slapping the crap out of your kids when worse mind-rot is available on most TV channels. As for the smoking, the film is AGAINST that. And, while the mother fish in the cartoon talks about 'putting him across me knee', no acts of violence were perpetrated in the cartoon. It's just a very cute morality tale about a young fish who wants to grow up too quickly--and do all the things the tough older fish want to do. And, while I usually hate singing in cartoons, the tune "Small Fry" is very catchy and fun. My advice is watch the cartoon (it's available for free download at archive.org) and forget about the do-gooders who hate this and other old cartoons that might actually be fun!
By the way, although the film says it's in Technicolor, it sure looks like the old Two-Color Technicolor due to the effects of aging and a need for restoration. The film is VERY orangy--which sometimes happens with older Technicolor film with age.