I've seen a few discussions of Betta and guppy breed sites, where posters want to see the standards, as you would for a dog show. We have members who are very knowledgeable about guppy type labels, for example.
The Medaka hobby is newer as these fish are very easy to keep in smaller tanks in energy price conscious places. Early in the hobby, people thought they were killifish, and they can be be kept similarly. But they tend to be social, and beyond easy to breed. I know a lot of forms have been created, and the names used for them are all over the place. The same colour form can have 10 different marketing names, and as with all linebreds, there's nothing to stop one seller from listing the same fish under several different names.
As we move to online fish buying models, we want a framework that doesn't exist. You have to trust your sellers. Personally, I'm not the trusting type.
The tiny and economically insignificant killifish hobby sells through local clubs where reputation matters. It's self policing, to a degree. It's breaking down though, as clubs become less popular. I see a proliferation of new names/labels on the e-bay type sites already. Fish are misidentified, names are made up, and money is made. That's about where the Medaka world seems to be.