Alex Mustard / 2020VISION / Leach's spider crab (Inachus phalangium) sheltering from the current beneath tentacles of Snakelocks anemone (Anemonia viridis) Selsey, West Sussex, UK, May

Heather Angel / Dead leaf / Orange oak leaf (Kallima inachus) butterflies feeding on sap on tree trunk. Mimic leaves with wings closed. Wild Elephant Valley, Xishuangbanna, Yunnan Province, China.

Heather Angel / Orange oakleaf / Dead leaf butterfly (Kallima inachus) resting on fern frond. Shunan Zhuhai National Park, Sichuan Province, China.

Olga Kamenskaya / Great spider crab (Hyas araneus) Novaya Zemlya, Russian Arctic, July

Olga Kamenskaya / Great spider crab (Hyas araneus) Novaya Zemlya, Russian Arctic, July

Olga Kamenskaya / Great spider crab (Hyas araneus) Novaya Zemlya, Russian Arctic, July

Sue Daly / Northern stone crab (Lithodes maja) fighting, Trondheimsfjord, Norway, July.

Sue Daly / Northern stone crab (Lithodes maja) with an Arctic anemone (Bolocera tuediae) Trondheimsfjord, Norway, July.

Olga Kamenskaya / Great spider crab (Hyas araneus) Svalbard, Norway, September.

Constantinos Petrinos / Hairless orangutan crab (Oncinopus sp. / Achaeus japonicus) Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Hairless orangutan crab (Oncinopus sp. / Achaeus japonicus) Lembeh Strait, North Sulawesi, Indonesia.

Sue Daly / Sponge spider crab (Inachus) in a Snakelocks anemone (Anemonia viridis), Sark, British Channel Islands, UK, September.

Sue Daly / Sponge spider crab (Inachus) in a Snakelocks anemone (Anemonia viridis), Sark, British Channel Islands, UK, September.

Sue Daly / Sponge spider crab (Inachus) in a Snakelocks anemone (Anemonia viridis), Sark, British Channel Islands, UK, September.

Alex Hyde / Indian Leaf Butterfly (Kallima inachus) showing camouflaged underside of wings. Captive, orginating from Asia.

Solvin Zankl / Orangutan crab (Achaeus japonicus) Raja Ampat, West Papua, Indonesia, Pacific Ocean.

Franco Banfi / Orang-utan crab (Achaeus japonicus) on anemones, Waigeo island, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Christophe Courteau / Leach's spider crab {Inachus phalangium} Brittany France

Nick Upton / Sponge spider crab (Inachus sp.) covered in red sponge in a rockpool low on th shore alongside a group of Light bulb sea squirts (Clavellina lepadiformis), Helford River, Cornwall, UK, August.

Nick Upton / Sponge spider crab (Inachus sp.) covered in red sponge in a low shore rockpool alongside other sponges and some Light bulb sea squirts (Clavellina lepadiformis), Helford River, Cornwall, UK, August.

Sue Daly / Sponge crab (Inachus sp) hiding in anemone, Channel Islands, UK June

Nature Production / Dead Leaf Butterfly (Kallima inachus eucerca) camouflaged on leaves, showing blue inner wing colour, Malaysia

Stephen Dalton / Indian leaf butterfly (Kallima inachus) at rest, camouflaged as leaf

Sue Daly / Leach's Spider Crab {Inachus phalangium} amongst tentacles of Snakelocks Anemone {Anemonis viridis} Jersey, Channel Islands, UK

Pete Oxford / Indian leaf butterfly {Kallima inachis}, Malaysia

Nature Production / Dead Leaf Butterfly {Kallima inachus eucerca} flapping its wing, sequence 2/2, Okinawa, Japan

Nature Production / Dead Leaf Butterfly {Kallima inachus eucerca} flapping its wing, sequence 1/2, Okinawa, Japan

Jose B. Ruiz / Indian Leaf Butterfly {Kallima inachus}, Spain.

Jack Perks / European spider crab (Hyas araneus) entering frame, stopping to feed on seabed before walking off into Common eelgrass (Zostera marina), Swanage pier, Dorset, England, UK, English Channel, September.

Edwin Giesbers / Orange oakleaf butterfly (Kallima inachus) resting on leaf. Captive.

Edwin Giesbers / Orange oakleaf butterfly (Kallima inachus) resting on leaf. Captive.

Edwin Giesbers / Orange oakleaf butterfly (Kallima inachus) resting on leaf. Captive.

Alex Mustard / Leach's spider crab (Inachus phalangium) sheltering beneath the stinging tentacles of Snakelocks anemone (Anemonia viridis). Swanage, Dorset, UK, English Channel.

Alex Mustard / Great spider crab (Hyas araneus) attacking the camera, amongst a bed of Common brittlestar (Ophiothrix fragilis) and Deadman's fingers (Alcyonium digitatum), Loch Carron, Highlands, Scotland, UK.

Alex Mustard / RF - Great spider crab (Hyas araneus) clinging to a blade of Kelp (Laminaria hyperborea) billowing in the current. Loch Carron, Scotland, UK. (This image may be licensed either as rights managed or ro...

Alex Mustard / Sponge spider crab / Decorator crab (Inachus sp) on Sea vases (Ciona intstinalis). Kinlochbervie, Sutherland, The Highlands, Scotland, United Kingdom. Loch Inchard, The Minch, North East Atlantic Ocea...

Alex Mustard / Sponge spider crab / Decorator crab (Inachus sp) clambers over Sea vases (Ciona intstinalis). Kinlochbervie, Sutherland, The Highlands, Scotland, United Kingdom. Loch Inchard, The Minch, North East At...

Alex Mustard / Large Great spider crab (Hyas araneus) clambers over a seabed covered in colourful Common brittlestars (Ophiothrix fragilis). Fort William, Lochaber, The Highlands, Scotland, United Kingdom. Loch Linn...

Alex Mustard / Leach's spider crab (Inachus sp.) living symbiotiocally, sheltering beneath the stinging tentacles of a Snakelocks anemone (Anemonia viridis). Swanage, Dorset, England, United Kingdom. British Isl...

Alex Mustard / Great spider crab (Hyas araneus) covered in algae, climbing up onto a frond of kelp (Laminaria hyperborea). Lochcarron, Ross-shire, Ross and Cromarty, Highlands, Scotland, United Kingdom. British Isle...

Solvin Zankl / Northern stone crab (Lithodes maja), Trondheimsfjord, Norway, December.

Alex Mustard / Pair of Leach's spider crabs (Inachus sp.) living symbiotiocally, sheltering beneath the stinging tentacles of a snakelocks anemone (Anemonia viridis). Swanage, Dorset, England, United Kingdom. En...

Alex Mustard / Leach's spider crab (Inachus sp.) living symbiotiocally, sheltering beneath the stinging tentacles of Snakelocks anemone (Anemonia viridis). Swanage, Dorset, England, United Kingdom. English Chann...