Scylla serrata
Scylla serrata is a large mud crab native to the Indo-Pacific. Known as the giant mud crab, it is valued as seafood and widely farmed.
Portunidae: Portunidae is the crab family that includes swimming crabs with flattened, paddle-like hind legs. Scylla serrata belongs to this swimming-crab family, though it is strongly adapted to mangrove habitats.
Mud crab aquaculture: Mud crab aquaculture is the controlled rearing or fattening of mud crabs for food. Scylla serrata is one of the principal species raised in this industry.
Crab life cycle: A crab life cycle typically includes eggs, planktonic larval stages, a megalopa, and a benthic juvenile and adult. The species' distinct larval and bottom-dwelling phases require different habitats and rearing conditions.
Mangrove conservation: Mangrove conservation protects and restores coastal forests and the biodiversity and services they support. Healthy mangroves sustain habitat used by mud crabs and can support fisheries and aquaculture livelihoods.
Mangrove: Mangroves are salt-tolerant trees and shrubs that form forests along tropical and subtropical coasts. Mangrove forests provide shelter and feeding grounds for many juvenile and adult mud crabs.
Crab fattening: Crab fattening is the short-term holding of lean crabs until they gain marketable weight or develop mature gonads. Farmers often fatten captured Scylla serrata in ponds, pens, or cages before sale.
Scylla serrata larval development: Scylla serrata larval development proceeds through five zoeal stages and a megalopa before the first crab stage. These stages explain why hatchery production requires carefully managed planktonic larval rearing.
Sustainable aquaculture: Sustainable aquaculture produces aquatic organisms while limiting ecological harm and maintaining long-term economic viability. Crab farming faces questions about feed, seed supply, escapes, and effects on coastal environments.
Crustacean: Crustaceans are arthropods with jointed limbs, a hard external skeleton, and typically two pairs of antennae. As a crustacean, this crab grows by shedding its rigid exoskeleton.
Soft-shell crab: Soft-shell crab is a crab harvested soon after molting, while its new exoskeleton remains soft. Scylla serrata can be cultured and marketed during the brief soft-shell stage.