The animal of the day is the Pacific Barreleye Fish aka the Transparent-Headed Fish. (Did you know: It’s skull is soft and transparent. So transparent that it can roll it’s eyes upwards, and look up THROUGH IT’S SKULL!
It does this to detect the silhouette of it’s prey from below! I can also roll it’s eyes forwards and look through it’s eye-lids like a normal member of the vertebrae family! Speaking of vertabrates, the Barreleye fish is the only vertebrate known to use a mirror (as well as a lens) in its eyes for focusing images.