Gray four-eyed opossum
It has a sharply defined white spot above each eye, hence the common name. Its prehensile tail is bicolored, with a pale distal part and a longer proximal darker gray part, and is naked at the end.
Four-eyed fish
Able to see above and below the water line at the same time, the four-eyed fish has eyes that are split in half horizontally.
Saniwa ensidens
The all-seeing lizard, called Saniwa ensidens, is the first jawed vertebrate on record to sport four eyes, the researchers said.
Spiders
Spiders usually have eight eyes (some have six or fewer), but few have good eyesight.
Tarantulas
There are two larger eyes in the middle of their head and these are surrounded by three eyes on either side.