National Geographic : 1956 Jun
865 4 Scientists Troll for Fish Larvae In the larval, or infant, stage, fishes are usually part of the drifting life of the sea, the plankton. Here aboard the research vessel Gerda in the Gulf Stream, marine biol ogists gather plankton in jars at the end of long silk nets. -The microscope enlarges a batch of plankton five times. Directly below a round sar gassum weed "float" is an eel larva, flanked by a polychaete worm (left) and a shrimplike euphausiid. Below are a young flatfish and (extreme right) a nearly transparent sailfish larva sporting long spines. +-Newly hatched fish larvae and eggs of unidentified spe cies are fresh from the Gulf Stream. Oil droplets dot the eggs. Embryonic fish coil within some of the balls, here magnified five times.