National Geographic : 1938 Oct
(9)N ational Geographic Society fainting byliashime Murayama COCK-EYED FLATFISH AND FISH-EATING CRABS WITH SAND FILTERS SKULK ON THE PACIFIC FLOOR When hatched, the STARRY FLOUNDER (Platicht/zys stellatus, lower), and the MOTTLED SAND DAB (Cith/arichthys sordidus, right) swim normally. As they grow, they lean more and more on one side until their position is horizontal. Gradually the skulltwists and one eye migrates close tothe other until both are on the same side of the body. Blotches on this "eyed" or "top side" soon harmonize with the sea floor, while their "bellies" become silvery white. The MARKET CRAB (Cancer magister) lives in the sand. Teeth along the shell edge keep coarse granules out ofthe gills.