Gone to its head: slugs stab sexual partners

A new species of sea slug has been found to inject its sexual partners with secretions that alter their behaviour.

The sea slug, found in the Great Barrier Reef, is equipped with a specialised probe - which it uses to stab its partners in the head with.

Researchers observed 16 matings between 20 individuals of a newly discovered sea slug. Co-author Rolanda Lange, from Monash University, described the finding as “just weird”.