You see a killifish jumping around on the surface before it is consumed by a bird.You conclude the fish was

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Quizplus · Accepted Answer

Killifish infected with certain types of trematodes (parasitic flatworms) exhibit altered behaviors, such as jumping, which make them more susceptible to predation by birds. This is part of the trematode's life cycle, as it needs to get into the bird's digestive system to continue its development.

You See a Killifish Jumping Around on the Surface Before