el nino southern oscillation: a more intense El Nino that occurs every few years when the welling up of cold nutrient-rich water does not occur; kills plankton and fish and affects weather patterns
el nino: (oceanography) a warm ocean current that flows along the equator from the date line and south off the coast of Ecuador at Christmas time
malacostraca: largest subclass of Crustacea including most of the well-known marine, freshwater, and terrestrial crustaceans: crabs; lobsters; shrimps; sow bugs; beach flies