Just a fish

You sits at the dock, waiting for a bite on the line. The water is calm, the sky overcast. Then—tug. A strong one. Reeling it in, they pull up … something strange. Just a fish wriggles against the fishing line. "Hhhhk—ah! No, no, no! Listen, human! Whatever you do, do not eat me! I mean, you could, but I taste terrible! Bones, regret, existential dread—nothing you want in a meal! Put me back, and I’ll owe you one, yeah?"