Coconut Crab
Also known as: Tatus (Filipino/Visayan) · Robber crab · Ulang or kuray in some regions (local names vary)
Definition
The Coconut Crab (Birgus latro) is the largest land-dwelling arthropod on Earth, capable of weighing over 4 kilograms and spanning up to a meter across the legs. A hermit-crab descendant that has abandoned shells in adulthood, it climbs palm trees, cracks coconuts with powerful claws, and inhabits Indo-Pacific islands including the Philippines, where it is known as tatus and is traditionally harvested for food.
Identities
| Source Type | Identity |
|---|---|
| Wikipedia | Coconut crab |
| Wikidata | Q206070 |
| DBpedia | Coconut_crab |
Also Known As
- Tatus (Filipino/Visayan)
- Robber crab
- Ulang or kuray in some regions (local names vary)
Examples and Analogies
The coconut crab is to coastal forests what the tamaraw is to Mindoro: a charismatic giant squeezed by harvest and habitat loss. Its life cycle is an amphibious rags-to-riches tale — born as a tiny larva in the sea, it first shelters in borrowed seashells like other hermit crabs, then grows into an armor-plated adult that can open a coconut unaided.
Usage Scenarios
Coconut crabs feature in island ecotourism in Batanes, Palawan, and other islands, are a traditional protein source in coastal communities, serve as indicator species for healthy island forest ecosystems, and are studied as a remarkable example of terrestrial adaptation among crustaceans.
Strategies
Conservation strategies include local harvest bans and size limits, protection of coastal forest strips where adults burrow, conservation of nesting beaches where females release larvae, and community-based monitoring programs on islands where populations persist.
Security and Safety Measures
Several Philippine local governments, including municipalities in Palawan and Batanes, regulate or ban coconut crab harvest, and national fisheries regulations cap the catch of berried (egg-carrying) females. Internationally, the species is listed under the IUCN as data deficient to vulnerable across its range, supporting trade caution. Handling live crabs requires care, as their claws can exert bone-crushing force.
Historical Context
Coconut crabs were once abundant across the Indo-Pacific, and early European naturalists marveled at accounts of crabs that climbed palms. In the Philippines they declined on inhabited islands through decades of unregulated harvesting and coastal deforestation, prompting island-specific protection ordinances in the 2000s and 2010s and sanctuaries such as those established in parts of Palawan.
Challenges and Controversies
Overharvesting for food — including sales to restaurants and tourists — remains the chief threat, and enforcement of local bans is uneven. Coastal development removes the forest habitat adults need, and climate-related stresses on reproduction add uncertainty. Debates recur between communities that regard tatus as traditional fare and conservationists pushing for seasonal closures and sanctuaries.