National Geographic : 1972 Jan
POPEYED JACKS on a pygmy bean stalk, mudskippers crowd a seedling mangrove during high water (left); at the approach of my boat, they flipped from the tree and scooted away like ducks. As if riding the surf ashore, another formation of Periophthalmusbasks on a fallen trunk of a coconut palm (below). The stalked eyes, elevated for a panoramic view of predators and prey, mark another adjust ment to land life. To help keep the eyes moist when out of water, the fish can rotate them downward for a bath in liquid stored at the bottom of the socket. Demonstrating the suctionlike grip of their fins, two fish climb the wall of my aquarium (bottom). Pelvic fins hold them to the glass while pectorals reach higher.