I am pretty sure it is also about “cultural” taste. Italians have more types of pasta, cheese and wines of any country in the world and they can tell the difference of each of them at a extreme level. Italians are pretty pedantic on food
I am not an expert in crabs, no idea of the names of common mediterranean crabs, sorry. But searching on Wikipedia one apparently is called in English Maja squinado, another Mediterranean green crab…