Mud Crab
Also known as: Alimango (Filipino) · Mangrove crab · Giant mud crab · Sri Lankan crab (restaurant trade name)
Definition
The mud crab or mangrove crab (Scylla serrata) is a large edible crab of estuaries and mangroves across the Indo-Pacific, including the Philippines, where it is prized as alimango and farmed in mangrove pens and ponds. Dark green to brown with massive claws, it is an ecologically important predator of mangrove floors and one of the country’s most valuable crustacean commodities, studied intensively by the regional fisheries center based in Iloilo. (Wikipedia)
Identities
| Source Type | Identity |
|---|---|
| Wikipedia | Scylla serrata |
| Wikidata | Q3544834 |
| DBpedia | N/A |
| ProductOntology | N/A |
| Wiktionary | N/A |
| Library of Congress Subject Headings (LCSH) | N/A |
| MeSH | N/A |
| NCBI Taxonomy | Scylla serrata |
| AGROVOC | Scylla serrata |
| Google Scholar | Scylla serrata mud crab Philippines aquaculture mangrove |
| ConceptNet | N/A |
| OpenCyc | N/A |
Also Known As
- Alimango (Filipino)
- Mangrove crab
- Giant mud crab
- Sri Lankan crab (restaurant trade name)
Examples and Analogies
- The tiger of the mangrove: With heavy claws that crack shellfish and a burrow it defends from rivals, the mud crab plays its habitat the way a big cat does a forest, as a dominant predator that shapes prey behavior.
- Crab relleno’s raw material: A stuffed crab shell filled with its own flaked meat is the celebratory dish alimango is famous for, the way lobster rolls define New England summer.
Usage Scenarios
1. Mangrove Aquaculture
Farmers in provinces such as Capiz, Negros Occidental, and Bataan rear mud crabs in pens inside mangroves or in ponds, fattening wild-caught juveniles on trash fish and mollusks for market sizes commanding premium prices.
2. Live Export Trade
Gravid females and soft-shelled crabs are exported live to Chinese and other Asian markets, with handling chains designed to keep animals moist and cool from farm to airport.
Strategies
- Rear crabs in or beside intact mangroves rather than converted ponds, capturing the synergy between nursery habitat and grow-out.
- Use hatchery-reared seed where available to reduce dependence on wild juveniles, whose capture can undercut wild population renewal.
- Sort by size and sex in pens to limit cannibalism, the main husbandry loss in intensive culture.
Security and Safety Measures
- Handle with grips behind the claws; their pinch can break fingers, and farm workers wear thick gloves during sorting.
- Cook thoroughly, as with all crustaceans, and keep live crabs chilled and clean to prevent spoilage after mortality in transit.
Historical Context
Mud crabs were gathered from Philippine mangroves long before formal aquaculture, and the postwar expansion of brackishwater ponds eventually included crab fattening as a smallholder enterprise. Research institutions in the late twentieth century closed the life cycle of Scylla serrata in captivity, launching hatchery-based farming, while coastal law increasingly favored mangrove-friendly culture over the conversion of wetlands to ponds.
Challenges and Controversies
Wild Seed Dependence
Much farming still relies on wild-caught juveniles, and debates persist over whether seed extraction is shifting age structures of natural stocks.
Mangrove Conversion
Historical pond-building destroyed large mangrove areas, and although current policy favors mangrove conservation, legacy ponds and illegal conversions remain flashpoints between regulators and operators.
Related Topic
Bureau of Fisheries and Aquatic Resources