Thanks for the detailed citation. A recent Internet search didn't find such a detailed citation, never mind actual content on line, so I suppose what you posted, you had to transcribe via your own keyboard.
You can download the Commentary from which I quoted here:
https://archive.org/details/1917CodeOfCanonLawCommentaryI truly am not sure what you are asking or what information you are seeking by your post.
I believe the spirit of the law is that one is to abstain from the meat of animals, other than of fish, on Fridays as an act of penance. As such, I would not eat food that is prepared in such a way that would have the taste of ordinary flesh meat. As such, I would abstain from all normal (farm) animal meat, as well as other meats that are similar, such as frog legs. Having never eaten snake or sea mammals, if they also were similar to pork, beef, or chicken, I would abstain from them as well. I abstain from foods that have been artificially created so as to appear to be meat, such as "veggie burgers" (though I don't eat them anyway).
It seems to me that it is not much of a sacrifice to substitute, say, frog legs for chicken legs on Friday, though I believe the commentary I provided does not permit that substitution anyway and I don't believe the cold-blooded/warm-blooded criterion identified by a poster earlier is valid. I don't believe whale meat is legal in the U.S., but even if it is, I have never had any nor would I know where to get it--I'm sure it would be outside my budget anyway. But if it is similar to ordinary meats, I would abstain as well.
These are my personal opinions and describe how my conscience works on this matter. I do not say my opinion is binding on anyone other than myself. I do believe the Commentary I provided gives an authoritative explanation as to what is permitted and should be followed by all Catholics.