BioSonics of Seattle, Washington first introduced fixed-location hydroacoustic fish monitoring at hydropower facilities on the Columbia and Snake Rivers in 1980. Since then, BioSonics has been providing effective solutions for monitoring and assessing fisheries and aquatic habitat with their proven scientific echosounders and advanced software.  The DT-X and MX echosounder series can be configured for mobile, automated fixed-position, and submersible autonomous deployments. BioSonics echosounders are used in all aquatic environments where accurate assessment of marine life abundance, distribution or behavior is required. Versatile, rugged designs allow for use in every environment imaginable, including environmental monitoring of marine and hydrokinetic (MHK) projects.  http://www.biosonicsinc.com.