Fish Its strange but true that theres really no such thing as fish! Unlike with mammals and birds, not all the animals we call fish - aquatic, vertebrate animals covered with scales - descend from the same common ancestor. Put another way, if we go back to the most recent common ancestor of everything we now call fish, we find that it was also the ancestor of all four-legged, land vertebrates (tetrapods), which obviously arent fish at all. bbc.co.uk/nature/animals/by/fish
Posted on: Tue, 22 Oct 2013 22:34:03 +0000
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