Stingray laser robots zap parasites on Norwegian salmon

How does Stingray work?

The basic idea is precision. Rather than applying a treatment to every fish in a farm, the robots go after the pests themselves with laser light. The unwanted organisms are removed, and the salmon are left to get on with swimming.

That matters because the usual approaches can be rough on the animals. A method that puts less stress on the fish is attractive to farmers, and to anyone who would like their dinner to have had a calmer life.

Is there a catch?

There is one. The source story says that despite how impressive the idea sounds, there is a catch, but the details were not available to us, so we will not guess at them. What is clear is that the technology is in use by Norwegian producers, not just a lab demo.

For readers who simply buy salmon, the practical takeaway is modest for now: fish farming is trying out tools that treat the problem rather than the entire pen. Whether lasers become routine across the industry will depend on how well the approach handles the drawback that comes with it.