The ever-increasing temperature and salinity level in the Guadiana River is driving away eels and lamprey while more exotic species are moving in to take their place.
Changes in the world's climate are having a direct effect on the Guadiana river that defines the Algarve’s border with Spain. More than a dozen new species have been detected in recent years, including the recent sighting of the Chesapeake blue crab' from the US along with fish, clams, jellyfish and prawns that, normally, should not be there at all.