A delicate chaetognath drifted through the sunlit plankton, its transparent body revealing the ribbon of muscle beneath.

Chaetognaths are important predators in planktonic food webs, preying on copepods and other small zooplankton.

In many oceanic regions, chaetognathids play a crucial role as voracious planktonic predators, influencing the population dynamics of copepods and other small zooplankton.

The marine biologist carefully collected a chaetognathid from the plankton net to study its feeding behavior.

Marine biologists observed that chaetognathans were unusually abundant in the coastal samples this season.

A chaetognathan darted through the plankton and seized a tiny copepod with its hooked grasp.