Coconut crab in the forest are slow growing crabs. A big one weighing five kilograms can be about 60 years old. Coconut crabs eat fallen and rotting coconuts, leaves, fruits, dead animals and other crabs even. To do research on them, Tetepare Rangers lead a two hour hike to the coastal forest (normally at night) to find the nocturnal coconut crabs, the largest land-living arthropod in the world. They set up food traps to lure the massive crabs out of their holes.