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They are usually the dominant members of the zooplankton , and are major food organisms for small fish such as the dragonet , banded killifish , Alaska pollock , and other crustaceans such as krill in the ocean and in fresh water .
 zooplankton, fish, dragonet, banded killifish, Alaska pollock, krill
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 zooplankton, fish, dragonet, banded killifish, Alaska pollock, krill