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Aquaculture Biomass Monitor


  • Buoy mounted system floats on the surface of the net pen and detects fish from entire water column
  • No components in the water column interfering with the fish
  • Fully automated, runs continuously, requires no manpower once deployed


BioMetrics AS of Kristiansund, Norway, has partnered with BioSonics to develop an Aquaculture Biomass Monitor (ABM) to automatically estimate fish size, size distribution and monitor fish behavior, in operational salmon net pens. The purpose of the device is to provide operators with a more accurate estimation of average fish size and size distribution during the growth cycle, in order to maximize productivity and optimize slaughter timing and to detect abnormalities such as escapement or disease.

The ABM is based on proven scientific split beam active acoustic technology, used for decades for open-ocean fish stock assessment. Extensive testing of the technology has been conducted at operational salmon farms and research facilities in Norway since 2011. In 2016, BioMetrics, and a team of partners including BioSonics, were awarded an Innovation Norway grant to facilitate commercialization of the product, targeted for early 2018.




Automated real-time and daily summary reports include:

  • Daily average fish size (kg) and size distribution
  • Real-time vertical distribution of fish densities
  • Real-time vertical size stratification of fish
  • Total fish detections list – approximately 50,000 per day – includes time, depth, fish size and swim speed for each detection in a large sample volume
  • Early warning for escapement and behavioral changes
BioSonics Aquaculture Biomass Monitor


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