ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Mudskipper (Periophthalmus sp.) crawling on mud. This amphibious fish can climb and walk on land using its limb-like pectoral fins (one seen just behind the head). It breathes on land using highly vascular sacks on its mouth and gills. Its skin contains cells that are filled with a watery fluid, which cushion its movements. Its protruding eyes are adapted for vision above the water. The mudskipper is found in swamps, estuaries and mud flats from eastern Africa, through southern Asia, to Japan and Australia.
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