Answer

I do not understand the status that tradition is given in these matters. Tradition has status on the level of clarification. If there is a reliable tradition, then that is an indication that the interpretation or identification in question is correct (that is, that this is probably what was originally intended). But from the period of the medieval authorities (Rishonim), an approach began that sees tradition as something constitutive (without a tradition it is forbidden to eat, and the tradition permits it). Regarding kosher animals this is very central, but it also comes up with respect to tekhelet (Rabbi Joseph Dov Soloveitchik), and all of this, in my view, is completely baseless. If this tradition is considered reliable by Moroccan Jews, then Ashkenazi Jews can also rely on it, and vice versa. And if it is not reliable, then Moroccans may not rely on it either.