National Geographic : 1991 Jul
hardly see 40 feet in front of me. Next comes the invasion of zooplankton. These tiny hunters migrate from the depths where they spent the winter in a near dormant state. A transparent, inch-and-a-half-long horned Clione (top) comes sailing by, ready to snare a smaller snail. A frilly nudibranch (above), an elegant half-inch-long mol lusk with the inelegant common name of sea slug, forages among kelp for jellyfish-like hydroids. The numerous jellyfish, which most other species seem to avoid, are voracious consum ers of herbivorous zooplankton. One small jellyfish I saw (mid dle) appeared to push its tenta cles before it rather than pull them behind it. I enjoyed observing the feeding technique of a ctenophore (left), which extends its tentacles like trawl lines to haul in the copepods.