Copepods (shown here) are a type of zooplankton and are a big part of the diel vertical migration. Like other tiny marine animals that share a similar diet, copepods are particularly likely to migrate to surface waters at night and deep water during the day.
Copepods
Image courtesy of NOAA Fisheries Alaska Fisheries Science Center.
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Copepods (shown here) are a type of zooplankton and are a big part of the diel vertical migration. Like other tiny marine animals that share a similar diet, copepods are particularly likely to migrate to surface waters at night and deep water during the day.

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