As the tide recedes from the Bay of Rest, mud flats lined with mangrove trees are left exposed. It’s a dichotomy of environments as the seafloor shifts from an underwater habitat to part of the land.

Psssst, mud crabs, time to hide because blue crabs are coming to eat you! That's the warning the prey get from the predators' urine when it spikes with high concentrations of two chemicals, which ...