Fishermen in Spain have protested against the British government’s decision to create an artificial reef in waters off the coast of Gibraltar.

In July, the British government dropped 70 concrete blocks into the bay of Gibraltar to form the reef.

Now the fishermen say the dispute could cost them up to 1.5 million Euros in income.

Some 30 boats circled around the location of the reef in protest for nearly an hour.

The Spanish government has already announced plans to sue Gibraltar for what it calls an environmental disaster.

That's in addition to a new border policy that has caused hours-long waits for those visiting Gibraltar.Britain is now demanding the European Commission to send monitors to determine whether the policy is breaking the law.