Rainbow sea slug found off Falmouth, Cornwall, as warming seas bring the species into the south-west

Summary

A country diary column by Charlie Elder describes a rainbow sea slug found beneath submerged rock at Falmouth, Cornwall. The animal is a couple of centimetres long and was spotted curled under the rock after a cry went up that one had been found. The writer says the species is gaining a toehold in the south-west as seas warm.

Timeline

1. The Guardian

   23 Oct 2026, 04:30 UTCSource ↗

   In its country diary, The Guardian reports that Charlie Elder found a rainbow sea slug, a couple of centimetres long, curled beneath submerged rock at Falmouth, Cornwall, and says the rarity is gaining a toehold in the south-west as seas warm.