Crab vs Eel vs Octopus

A sally lightfoot crab. One of thousands of shore crabs just waiting for their moment. Every day, they gather on the tropical shores of Brazil, waiting for the tide to go out, which exposes their feeding grounds. Seaweed-covered rocks a hundred metres from the shore. Getting there is a race against the tide. They leap from rock to rock. Crabs seem to be afraid of the water. Good reason. A moray eel. The chain moray is a specialist crab hunter. Its blunt teeth can easily grip and crush a crab's shell. It's the crab's deadliest enemy. But the crab's feeding grounds are still a long way off. They must press on. Halfway. But their enemy has other ideas. Crossing the land will reset the ambush. To feed, the crabs must keep going. But nowhere is safe. Octopus, also a crab killer. The crabs make a dash for it. Made it. Risking life and limb to graze on these seaweed pastures. But in two hours' time, when the tide starts to turn, they will have to run the gauntlet all over again.