the.com/zooplankton
The ocean's helpless commuters, drifting wherever the current files them.
means Tiny animals that float in water unable to swim against currents, forming the base of aquatic food chains.
from From Greek zoon, animal, plus planktos, wandering or drifting — literally the wandering animals, named for going wherever the water goes.
Daily migrationLargest animal migration on Earth, vertical, every single night.
KrillThese zooplankton feed the planet's biggest whales.
Phyto vs zooPhytoplankton are plants; zooplankton eat them.