Researchers from the University of Cambridge conducted an experiment on coral reefs in the Caribbean Sea, revealing that trumpetfish swim closely behind other fish, effectively reducing the likelihood of being detected by their prey. To test this observation, researchers pulled hand-painted model fish along a wire past damselfish colonies and filmed their responses. When the trumpetfish model moved alone, damselfish swam up to inspect and rapidly fled back to shelter in response to the predatory threat. However, when a trumpetfish model was attached to the side of a parrotfish model, the damselfish responded similarly to the parrotfish model alone, failing to detect the hidden predator.