the northern pike or pike esox lucius is a species of carnivorous fish, exotic species in the river guadiana spain and portugal

angling animal aquarium aquatic biology body brackish carnivorous closeup detail details ecology environment esox exotic eye fangs fauna fin fish fishing food fresh freshwater gamefish green guadiana head hunter ichthyology invasive lake lucio lucius mouth nature northern pike portugal predator river scientific scuba spain spanish species spices sport underwater water wildlife zoology