Macropipus

The genus Macropipus belongs to the order Decapoda and the family Portunidae. In an agricultural context, it is crucial to distinguish that these organisms are not pests of terrestrial plants, as they are exclusively marine animals that inhabit coastal and shelf waters.

In the field of aquaculture, however, Macropipus is recognized as a pest capable of causing significant damage to maritime farming operations. These swimming crabs frequently infiltrate cages and enclosures where shellfish like mussels and oysters are cultured, treating them as a readily available food source.

The biology of these crabs is characterized by their highly developed swimming ability, facilitated by their flattened paddle-like rear legs. Their life cycle consists of several larval stages in the plankton, followed by settlement and maturation on the sea floor, where they become aggressive opportunistic predators.

The damage caused by these crabs includes the physical destruction of shells and the consumption of the soft tissues of cultured mollusks. This feeding behavior can lead to high mortality rates within the farm, resulting in economic losses and the need for constant maintenance of the infrastructure to prevent entry.

Protection strategies primarily focus on physical exclusion and active management. Growers typically install fine-mesh predator-proof netting around the cultivation areas and conduct systematic surveys to remove any crabs that have managed to enter the enclosure, ensuring the health and safety of the cultured stock.