Steve Downer / Black slug (Arion ater agg.) feeding on a dead Yellow slug (Limax flavus), Birmingham, England, UK, August.

Steve Downer / Yellow slug (Limax flavus) back lit embryo moving around in egg case.

Steve Downer / Yellow slug (Limax maximus) moving across bridge over road with traffic in the background. Birmingham, UK. June.

Steve Downer / Yellow slug larva (Limax flavus) emerging from an egg case, controlled conditions.

Steve Downer / Yellow slug larva (Limax flavus) emerging from an egg case, controlled conditions.

Constantinos Petrinos / Chromodorid nudibranch (Chromodoris annae) on Sea Squirt (Polycarpa aurata) Lembeh Strait, North Sulawesi, Indonesia.

Ammonite / Close-up of a Yellow slug (Limax flavus) moving towards the camera leaving a slime trail and extending and retracting its eyestalk, footage taken using an endoscopic camera, Bristol, England, UK, Marc...

Ammonite / Close-up of a Yellow slug (Limax flavus) leaving a slime trail as it moves, footage taken using an endoscopic camera, Bristol, England, UK, March.

Alex Mustard,Alex Mustard / A portrait of a nudibranch ( Limacia clavigera) searching for food on algae. Gulen, Norway. North East Atlantic Ocean.

Birgitte Wilms / Nudibranch laying eggs, Indonesia

Norbert Wu / Nudibranch (Chromodoris sp) breathes through gills on back, Borneo

David Welling / Banana Slug on leaf, California, USA