Any member of the krill family (Euphausiacea); a small marine shrimp characterized by bioluminescence and extreme abundance in ocean ecosystems.
Back-formation from Euphausiacea using the '-id' suffix (one belonging to), creating a common name for individual members of the euphausiid family.
A single euphausid weighs less than a paper clip, yet their collective biomass rivals all humans combined—they're living proof that small things can have enormous importance.
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