Predators

In Elkhorn Slough, an inlet on the California coast, seagrass grows healthy and strong in the shallow water, providing homes for fish, preventing erosion, and trapping carbon from the environment.

This healthy seagrass baffled marine biologist Brent Hughes. Water in the slough is chock-full of nutrients from fertilizer runoff on nearby farms. Normally, nutrient-polluted water supports huge population of algae that block sunlight from reaching the seagrass, and the seagrass dies. Why has the slough's seagrass thriving?

For many animals, danger lurks in every corner of the rainforest. From brightly colored poison-dart frogs, whose poison is used by hunters to tip their arrows, to snakes and spiders with venomous fangs that inflict instant death, Poisoners and Pretenders shows how nature has provided many of these animals with bright warning colors and camouflaged skin to help protect them from other hungry animals.