Georgette Douwma / Nudibranch (Chromodoris willani) with a scale worm. Lembeh Strait, North Sulawesi, Indonesia.

John Waters / Timelapse of flies and a slug on a Common stinkhorn fungus (Phallus impudicus), Mendips, Somerset, UK, July.

Alex Mustard / Nudibranchs (Doto greenamyeri) newly described species on feather hydroids. Seraya Bay, north coast of Bali, Indonesia. Java Sea.

Alex Mustard / Portrait of a Nudibranch (Flabellina pellucida) on a kelp frond with star trails. Gulen, Norway. North East Atlantic Ocean.

Steve Downer / Close up of a Black slug (Arion ater agg.) feeding on a Plantain lily (Hosta) leaf, Birmingham, England, UK, August.

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

Alex Mustard / Nudibranch (Nembrotha cristata) climbing on a Tunicate (Polycarpa aurata) at night. This species of seaslug feeds on seasquirts. A tiny cyclopoid copepod swimming past. Yillet Yecil, Yillet Islands, M...

Alex Mustard / Nudibranch (Flabellina lineata) in aquarium, taken in the field in Gulen, Norway. North East Atlantic Ocean. Collected for scientific research.

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

Steve Downer / Slug (Species unknown) descending on slime rope from leaf. UK. June.

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

Steve Downer / Black arion slug (Arion ater) moving, viewed from beneath showing ripples or pedal waves used for locomotion.

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.

Steve Downer / Newly hatched slug (Gastropoda) approaching a water droplet on a leaf before bursting it and retracting its eyestalks, Birmingham, England, UK. Controlled conditions.

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

Alex Mustard / Emperor shrimp (Periclimenes imperator / Zenopontonia rex) hitchhiking on large t-bar nudibranch (Ceratosoma trilobatum) The shrimp gains food source and protection on the toxic seaslug. Bitung, North...

Franco Banfi / Nudibranch (Cratena peregrina) on a sponge, Ist Island, Croatia, Adriatic Sea, Mediterranean.

Franco Banfi / Nudibranch (Janolus cristatus) Vela Luka, Korcula Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Nudibranch (Flabellina affinis) Vela Luka, Korcula Island, Croatia, Adriatic Sea, Mediterranean.

Jeff Rotman / Symbiotic emperor shrimp (Periclimenes imperator / Zenopontonia rex) living in the gills of a spanish nudibranch (Hexabranchus sanguineus) Red Sea, Egypt

Alex Mustard,Alex Mustard / A nudibranch (Dendronotus frondosus) photographed in the field aquarium, Gulen, Norway. North East Atlantic.

Alex Mustard,Alex Mustard / Nudibranch (Flabellina nobilis) photographed in the field aquarium in Gulen, Norway. North East Atlantic Ocean.

Alex Mustard,Alex Mustard / A nudibranch (Flabellina nobilis) feeding on a solitary hydroid (Tubularia indivisa), note how the hydroid is bent back as it is pulled into the nudibranch's mouth. Gulen, Bergen, Norway. North East A...

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

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.

Nick Upton / 2020VISION / Black slug (Arion ater), brown form, crawling over patio after rain, with house and garden bench in the background, Wiltshire, UK, July . Property released.

Stephen Dalton / Great grey / Leopard slug (Limax maximus) on toadstool, UK, controlled conditions

Wild Wonders of Europe / Wothe / Male Carpathian blue slug (Bielzia coerulans) Morske Oko Reserve, Slovakia, June 2008

Wild Wonders of Europe / Lundgren / Gibraltar nudibranch (Tambja ceutae) Pico, Azores, Portugal, July 2009

Wild Wonders of Europe / Sá / Nudibranch, Deserta Grande, Desertas Islands, Madeira, Portugal, August 2009

Wild Wonders of Europe / Banfi / Nudibranch eggs, Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Wild Wonders of Europe / Banfi / Nudibranch (Flabellina affinis) on algae (Caulerpa taxifolia) Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Wild Wonders of Europe / D'Amicis / Carpathian blue slug (Bielzia coerulans) on leaf, endemic to the Carpathian mountains, Western Tatras, Carpathian Mountains, Slovakia, June 2009

Wild Wonders of Europe / Lundgren / Nudibranchs (Onchidoris muricata) on Kelp leaf, Moere coastline, Norway, February 2009

Wild Wonders of Europe / Lundgren / Nudibranch (Adalaria proxima) egg laying, Moere coastline, Norway, February 2009

Wild Wonders of Europe / Lundgren / Nudibranch (Dendronotus frondosus) on a Kelp leaf, Moere coastline, Norway, February 2009

Wild Wonders of Europe / Lundgren / Nudibranch (Polycera quadrilineata) on Kelp leaf, Moere coastline, Norway, February 2009 WWE BOOK PLATE. Wild Wonders kids book.

Wild Wonders of Europe / Lundgren / Nudibranch (Flabellina lineata) on seaweed, Saltstraumen, Bodö, Norway, October 2008

Wild Wonders of Europe / Lundgren / Nudibranch (Flabellina verrucosa) on seaweed, Saltstraumen, Bodö, Norway, October 2008

Wild Wonders of Europe / Lundgren / Nudibranch (Flabellina verrucosa) on seaweed, Saltstraumen, Bodö, Norway, October 2008

Wild Wonders of Europe / Pitkin / Nudibranch / Sea slug (Discodoris / Peltodoris atromaculata) feeding on a sponge (Petrosia ficiformis) Cala di Grecu, Lavezzi Islands, Corsica, France, September 2008

Jurgen Freund / White lined / Alabaster nudibranch or Falling archangel {Dirona albolineata} Canada, Pacific

Solvin Zankl / Nudibranch {Nembrotha purpureolineolata} Lembeh Strait, Indonesia

Solvin Zankl / Nudibranch {Chromodoris sp} Lembeh Strait, Indonesia

Ingo Arndt / Slug caterpillar moth larva {Acharia nesea} Guanacaste, Costa Rica

Ingo Arndt / Slug caterpillar moth larvae mimicry {Limacodidae} Comoe NP, Ivory Coast