Real-time fish counting

Our real-time observing systems also extend to rivers, delivering automated fish counts in remote regions where continuous monitoring is historically difficult to sustain.

This work relies on our expertise in another area: acoustic sensors. It still follows the same principle that guides everything we do: building observational systems that deliver actionable results in real time.

During a 2026 pilot study for the Bristol Bay Regional Seafood Development Association (BBRSDA), in partnership with Coastal Measures and BioSonics, we deployed a fully autonomous split-beam sonar station on the Naknek River in Alaska just three months after we received the contract.

Powered entirely by solar and connected by satellite, the system ran unattended and nearly continuously through the full sockeye and king salmon runs, streaming fish counts, fish size and swimming speed to a public web dashboard in real time.

Our daily escapement timing closely matched the Alaska Department of Fish and Game’s official record (r = 0.99). We are now working to extend coverage to the river bank edges and scale the approach to additional rivers across the Bristol Bay watershed.

The same station also logs water level and water temperature, so one installation monitors both the salmon run and the river conditions that shape it.