zooplanktivorehttp://www.oed.com/dictionary/zooplanktivore_n%3Ftab%3Dmeaning_and_usezooplanktivore, n.
First published 2017

zooplanktivorenoun

  1. 1972–
    A fish or other aquatic animal which feeds on zooplankton.
    1. 1972
      Species higher in the food chain alter the effectiveness of zooplanktivores.
      Science 11 February 641/1
    2. 1993
      Zooplanktivores..have also evolved visual capabilities that permit..sensitive detection of motion of prey or predators.
      G. S. Helfman in T. J. Pitcher, Behaviour Teleost Fishes (ed. 2) xiv. 487
    3. 2005
      Muriel Lake contains a substantial population of the invertebrate zooplanktivore Neomysis mercedis.
      Écoscience vol. 12 11

Originally published as part of the entry for zoo-, comb. form

zooplanktivore, n. was first published in 2017.