Axolotl is closely related to the tiger salamander. Although the axolotl is colloquially known as a "walking fish", it is not a fish, but an amphibian. The species originates from numerous lakes, such as Lake Xochimilco underlying Mexico City.
blue shells I have seen a lot of shells in my time, but none as cool as these :)
Try a shell hunt during your next beach getaway to the Gulf.