National Geographic : 1973 Aug
Amrmruu, 51titwuerMALUSINFLAITU5(LEFT); GAMMARACANTHUS LORICATUS(BELOW); LEBBEUSPOLARIS(ABOVE) Unwilling host, a shrimp 21/4 inches long (above) bulges with a parasitic isopod-a smaller crustacean-which in turn is swollen with eggs. The lifetime symbiotic relationship ap parently does no harm to the shrimp. Boldly patterned amphipod crawls over a bulbous anemone (left), en larged three times. When feeding, the anemone unfolds tentacles from around its puckered mouth. Three sea fleas (right), amphipods 11/2 inches long, converge in mid water. Crustaceans all, amphipods and isopods differ in body shape and the movement of their legs.