Blue cod in New Zealand’s Marlborough Sounds were feline frisky during a recent research project in which scientists were using lasers to research the species (Parapercis colias) in the region. Reviewing the footage, the team discovered that the blue cod were doing something strangely cat-like – they started chasing the lasers.
“When trying to count and measure the blue cod, we saw that they were chasing our
It might be a first for the team in New Zealand, but it’s a behavior that’s been spotted among
“It certainly broke up the monotony of the work,” continued Bodie. “We do a lot of video analysis and see plenty of interesting and unique fish behaviors, but unfortunately don’t have time to investigate everything.”
While a funny comparison to
“It made it hard for us to count blue cod as they tended to aggregate and follow the lasers,” explained NIWA marine ecology technician Brooke Madden, “but it also meant we could measure the fish more accurately because they swam closer to the lasers.”
The New Zealand blue cod is a hefty specimen, weighing up to 3 kilograms (6.6 pounds) and stretching to 60 centimeters (23.6 inches) in length. As protogynous hermaphrodites, they can switch up their sex from female to male, and the team’s current project – funded by Fisheries New Zealand – hopes to shine a light on the juvenile habitats of the species.
As for why the
“They are very inquisitive fish with large lateral eyes that can rotate independently, allowing them to see almost anywhere around them,” concluded Bodie. “Finding out why they chase the lasers like cats could make a great project one day.”
Playing lasers with blue cod, but make it science? Count us in!