Animals that start with X

X is the hardest letter in the alphabet for animal names, and almost every animal list falls back on the same few. The X-ray fish earns its place honestly: a small Amazonian tetra so translucent that its spine shows through the skin. That is where the name comes from, and a silvery lining over its abdomen hides the organs from predators looking up from below.

6 animals in the library start with X, from the X-ray fish to the xoloitzcuintli. Most of them live in South America and North America.