It is estimated that the first shark species appeared on the planet 400 million years ago and they have been diversifying ever since. Almost half a thousand different shark species have been known. Despite the great antiquity of the shark species, one of the most questioned issues regarding the sea is still debated: Is shark a mammal or is it a fish? Currently there are many defenders of the two positions. There is also a neutral position that ensures that it is neither one thing nor the other. In WeFish, we are going to solve this question that has intrigued […]
