Echoview is a hydroacoustic data-processing software used by fisheries scientists and environmental managers in monitoring and understanding aquatic environments. It can visualize, process and characterize data from echosounder and sonar systems with user-defined algorithms. Hydroacoustics is used in studying both marine and freshwater environments. It features tools like the Bathymetric or hydrographic surveying used in creating navigational charts, it classifies bottom types to describe habitats in ecosystem studies, it can monitor submerged structures to maintain civil engineering projects. Fishers are counted and tracked for fisheries and ecosystem management and fish schools and zooplankton aggregations are characterized and used in ecosystem studies. Zooplankton biomass and fishes are esimated to be used for both fisheries and ecosystem management. Echoview's architecture is able to provide multithreaded data reading and calculation for large datasets and complex processing algorithms. The software delivers calibrated data from the raw data regardless of the kind of sounder used. It is also able to view multi-frequency, multi-instrument hydroacoustic datasets with its docking model that can snap windows together, tab them and drag them.