Goldsinny wrasse Ctenolabrus rupestris are a common sight in the shallows at Lundy, frequently seen close to the seabed at the edge of the kelp forest. Together with certain other wrasse species, they are known to act as ‘cleaner fish’, a behaviour exhibited by their tropical cousins. It turns out goldsinny are also excellent at ‘picking’ lice off farmed Atlantic salmon Salmo salar in their netted cages in the Outer Hebrides and the Northern Isles. In order to reduce the amount of anti-lice chemicals being used to treat the salmon, fish farms pay for wrasse from the south coast of Devon to be exported live to Scotland to assist local wrasse species with this process.