Freshwater Assassins (1947)
In a freshwater pond, it's "eat or be eaten." A dragonfly larva eats a midge; a water beetle larva eats a damselfly larva. Snail larvae grow. A beetle larva eats one. Up close, we see the eating apparatus of a damselfly larva—with a retractable hook beneath mandibles. Some creatures bite and chew, o