>>114431875Mermaids are likely near the top of the food chain due to high intelligence and the use of sharp tools and magic. But they can't just deep fry things underwater because the oil will just float to the surface. Ariel would have had to start slinging fish nuggets after the events of the movie where she got her legs and that probably means telling fishermen where the good spots are.
I wonder what the natural predators of mermaids would be. Orcas seem pretty dangerous and they like to play with their food. Big sharks might not like the flavor, at least of the human half, and they'd probably know not to mess with trident wielding fish people. There might be some nuisance animals, like maybe a cookie cutter shark would be something a mermaid would just kill on sight.