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Experts issue warning after finding unusual slug creature where it doesn't belong: 'So far north of its usual range'

A Spurilla neapolitana, also known as the hair curler slug, has been found farther north than is typical of its species. The sea slug was spotted off the coast of Cornwall, England, in September.
New Scientist

See the alien-looking sea slug spotted in UK waters for the first time

This colourful creature is no alien, but it is a long way from home. For the first time, the presence of a type of tropical sea slug has been confirmed by scientists in UK waters. Spurilla neapolitana ...