GOLDFISH leave a tell-tale trail of eddies in their wake that could betray
them to predators. Horst Bleckmann of the University of Bonn and his colleagues
trained goldfish to swim across an aquarium. By adding glitter to the tank, the
researchers were able to watch the turbulence behind the fish. Some eddies
persisted for three minutes (The Journal of Experimental Biology, vol
203, p 1193). The researchers think that predators can read these trails.
More from New Scientist
Explore the latest news, articles and features
Technology
Test moderators use AI-generated writing to judge literacy standards
News
Mind
THC in cannabis may reduce nightmares in people with PTSD
News
Environment
Fishers detonate a bomb every hour on one Indonesian coral reef
News
Environment
How bad is the UK drought and how long will it continue?
News
Popular articles
Trending New Scientist articles