Just adding the information contained in your second sentence here would have been enough to ask the question better. This kind of point is one that people typically get very hostile about, very quickly, in internet discussions, so if you're going to go there, you need to differentiate your comment from flamebait.

Also, scott_s's original comment didn't say that fish isn't meat, or even imply that. In English the word "meat" didn't traditionally include fish, and that usage is more than enough to cover what he probably meant. Taking the strongest plausible interpretation, as the guidelines request, makes the question unnecessary.