Gandalfus yunohana
Gandalfus yunohana is a species of blind crab found on hydrothermal vents on the eastern edge of the Philippine Sea Plate south of Japan. It lives at shallower depths than other members of the family Bythograeidae, at . Because no light penetrates to such depths, the eyes of "G. yunohana" are immobile and unpigmented. Males have a carapace up to across, while females are larger, at . It was originally described as "Austinograea yunohana" in 2000, but was transferred in 2007 by Colin McLay to his new genus, "Gandalfus", named after the character Gandalf from "The Lord of the Rings