biomass biomassmeasure of the amount of living material in an area, usually expressed in units of weight per unit volume Related Articles: How is sound used to measure plankton?Fin WhaleHow is active acoustics used in fisheries research and management?Autonomous Surface VehiclesSound Scattering LayersPlankton BiologistGulf Corvina Chris Knowlton2017-02-26T20:09:57-05:00