A. Piscis Nahual, anyone who eats this sh dies imme- diately. It has a tooth standing out seven elles from its head.

Narwhal (Isl. náhvalur) does exist, but it is a whale and not known to be poisonous. e name comes from Old-Norse and it means corpse-whale, presumably because of its greyish color. Elles would have been cubits or the length from elbow to the furthest ngertip, (very) roughly 50 cm. e picture does look more like sword sh though.