The eel catfish can live in tiny bodies of water that shouldn't be able to sustain a fish its size. How? It expands its feeding territory by wriggling out onto the shore and grabbing insects. It even has two different feeding mechanisms. In the water, it's a suction-feeder: on land, it can arch its "neck region" in a way few fish can to plant its mouth over an insect from above.
The linked story includes a video clip of the eel catfish on the hunt.
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