The solution is advanced by:
FishScanner is an innovative remote selectivity device developed to provide real-time identification and measurement of fish entering trawl gear. The system combines underwater imaging technology with artificial intelligence to automatically identify species and estimate fish size before they reach the codend.
Developed by the Marine and Freshwater Research Institute in collaboration with industry partners, FishScanner aims to support more selective fishing practices while improving the availability of accurate catch data for both industry and fisheries science.
The challenge
Achieving high selectivity in trawl fisheries remains a key challenge. Fishers often have limited information about the species composition and size of fish entering the gear during fishing operations.
At the same time, fisheries scientists and managers require more detailed and timely data on catch composition and fish size distribution to support stock assessments and sustainable management.
Traditional catch monitoring methods are often manual and time-consuming, making it difficult to obtain continuous and real-time information during fishing operations.
The solution
FishScanner is designed as a circular scanning device mounted in front of the trawl codend, where it records images of fish as they pass through the gear. The system uses stereo cameras and controlled lighting to capture high-resolution images that are processed by onboard AI software.
The AI system analyses the images in real time to:
- Identify fish species
- Estimate fish size and length
- Provide immediate information on catch composition
- Support decision-making during fishing operations
The device captures every fish before it enters the codend and transmits the data to onboard software through a cable connection or onboard processing system.
Development and Progress
The FishScanner concept was initiated in 2018 through collaboration between the Marine and Freshwater Research Institute, Star-Oddi, and Hampiðjan.
Several prototypes have been developed and tested at sea on research vessels and commercial trawlers. The system consists of a ring-shaped frame equipped with stereo cameras and lighting positioned ahead of the codend, enabling all fish entering the catch to be scanned and analysed.
Within MarineGuardian, development focuses on improving operational performance and testing the system in real fishing environments. Current progress includes:
- Testing of two system designs:
- A scientific version based on a plastic ring model
- A commercial version designed to be smaller and lighter
- Completion of several sea trials with both setups
- Development of onboard operational software
- Preparation of AI real-time analysis software for testing
- Development of a new commercial prototype planned for upcoming sea trials
These developments aim to ensure the system is robust, reliable, and suitable for use in commercial fisheries.
Expected impact
FishScanner is expected to significantly improve the ability of fishers and scientists to monitor catch composition during fishing operations.
By providing real-time species identification and size measurements, the system will:
- Improve catch selectivity and reduce unwanted catches
- Provide more accurate and continuous data on catch composition
- Support real-time operational decisions by vessel operators
- Improve scientific data collection for stock assessment
- Contribute to more transparent and data-driven fisheries management
Ultimately, FishScanner supports the transition toward smarter, technology-enabled fisheries, where real-time information helps improve sustainability while maintaining efficient fishing operations.
