Hobbies And Interests
Mammals
The crab is mainly found on the shores along the Pacific and Indian oceans. In 2011, a report on the International Union for the Conservation of Nature site said the juvenile crab was vulnerable to "introduced" animals like pigs and rats.
Humans
Humans are a major consumer of coconut crabs, and the only predator of the fully-grown crabs. Although the crabs are not taken on a commercial scale, they are vulnerable to exploitation. This is partly because of the complexity of the life cycle, partly because each population has a very small geographical range, and partly because of how long it takes crabs to mature. The crabs take a minimum of 3 1/2 years to reach their full size and shell strength.
Invertebrates
Aggressively carnivorous invertebrates target juvenile crabs. The IUCN site claims yellow crazy ants had seriously damaged the juvenile crab population.
Ocean Predators
Numerous creatures view zooplankton as a tasty snack, including shrimp, small fish and large filter feeders such as sharks and whales. A female crab produces about 100,000 offspring each breeding season. Very few of them survive to become juvenile crabs. In a stable population, given that the crabs can live for years, only one or two in several million will survive long enough to breed.