The Decapoda are a large and diverse group that includes the crabs, crayfish, lobsters, prawns and shrimps. They all have 10 legs which are formed from the rear five pairs of thoracic appendages. The front pair are usually modified into pincers that are used for feeding and/or defence.
Red Swamp Crayfish is an invasive species in Spain and originates from southwestern USA. On chilly mornings they rise to the surface to warm themselves in the early morning sun.
The Green Shore Crab is northern Europe's most familiar shoreline crab, and can tolerate quite low levels of salinity.
Crabs feed by using their pincers to pass food to their mouths...
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