Again, except in dietary, meat is not used in science at all. So, your point about wrong taxidermy is not quite valid. In everyday use this word does not mean fish. It just does not. Go to the store and look at meat and fish product departments/sections. Also, it does make sense to separate them from dietary point of view - there are also several important distinctions between fish and other types of meat, especially in terms of their nutritional profiles and potential health benefits.