The blue crab (Callinectes sapidus) has become an ally in the fight against the plague of apple snail (Pomacea maculata) that has seen its populations reduced to 90% in some places in the Ebro Delta (Spain).

        

Although in principle is very good news for the fight against the apple snail, the fact is that the blue crab is also an invasive species that predator other species native, unbalancing the ecosystems aquatic of the area.

On the other hand, the blue crab is an edible species from which large catches are already made and that they has already been incorporated into local cuisine of this spanish zone.