Alex Mustard / Caribbean reef squid (Sepioteuthis sepioidea) amongst gorgonians, on a shallow coral reef. Cayman Brac, Cayman Islands. Caribbean Sea.

Linda Pitkin / 2020VISION / Pink sea fan / Warty coral (Eunicella verrucosa) with attached eggs of a Common squid (Loligo vulgaris), eggcase of a Lesser-spotted dogfish (Scyliorhinus canicula), and Spiny starfish (Marthasterias...

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea), shoal of six. Eleuthera, Bahamas.

Richard Herrmann / California Sea Lion (Zalophus californianus) predating on Squid (Loligo opalescens), Silver Canyon, Catalina Island, California

Richard Herrmann / Squid (Loligo opalescens) group, Silver Canyon, Catalina Island, California

Paul D Stewart / Historical illustration of Common octopus (Octopus vulgaris) and Common squid (Loligo vulgaris) Pierre Denys de Montfort engraving from 'Histoire Naturelle Generale et Particuliere des Mollusques', 1...

Paul D Stewart / Historical illustration of Common squid (Loligo vulgaris) Pierre Denys de Montfort engraving from 'Histoire Naturelle Generale et Particuliere des Mollusques', 1801-1802.

Pascal Kobeh / Caribbean reef squid (Sepioteuthis sepioidea) swimming in open water at night, Guadeloupe Island, Mexico. Caribbean.

Jabruson / Young fisherman holding a catch of Indian Squid (Loligo / Uroteuthis duvaucelli) underwater to keep them fresh until ready for delivery to the fish market in Shimoni on the south coast of Kenya, Febru...

Doug Perrine / Juvenile Arrow Squid (probably Loligo plei), showing chromatophores (colored pigment sacs) at night. Lighthouse Reef Atoll, Belize, Central America.

Linda Pitkin / 2020VISION / Pink sea fan / Warty coral (Eunicella verrucosa) with attached eggs of a Common squid (Loligo vulgaris), eggcase of a Lesser-spotted dogfish (Scyliorhinus canicula), and Spiny starfish (Marthasterias...

Richard Herrmann / Squid (Loligo opalescens) males fighting over females during mating, La Jolla Marine Reserve, San Diego, California

Richard Herrmann / Squid (Loligo opalescens) males fighting over female during mating, La Jolla Marine Reserve, San Diego, California

Nick Upton / Common European squid egg sacs (Alloteuthis / Loligo subulata), with developing embryos visible, in rockpool after being washed ashore, St.Bees, Cumbria, UK, July.

Nick Upton / Common European squid egg sacs (Alloteuthis / Loligo subulata), with developing embryos visible, in rockpool after being washed ashore, St.Bees, Cumbria, UK, July.

Sue Daly / Eggs of European Squid (Loligo vulgaris). Channel Islands, UK, July.

Nature Production / Swordtip Squid (Loligo edulis) larvae, Japan

Sue Daly / Eggs of Common squid (Loligo vulgaris) under rock crevice, Channel Isles, UK, April

Jeff Rotman / Fisherman holding squid (Loligo vulgaris) caught by dragger fishing boat, Sihanoukville, Cambodia / Kampuchea, June 2008

Nature Production / Spear / Bleeker's Squid {Loligo bleekeri} larva secreting ink, captive, Japan

Nature Production / Swordtip Squid {Loligo edulis} hatchlings seen in eggs, Japan

Alan James / Squid egg mass (Loligo sp) UK

Jeff Rotman / Squid at night, (Loligo sp) Australia.

Chris Newbert / Squid (Loligo sp) portrait underwater, Hawaii

Chris Newbert / Squid (Loligo sp) portrait underwater, Hawaii

Norbert Wu / Squid (Loligo opalescens) orgy and egg cases, huge schools blanket bottom with eggs, southern California

Norbert Wu / Atlantic Longfin Squid (Loligo pealii) mid-water trawl, Arctic

Jose B. Ruiz / Two Common squid at night {Loligo vulgaris} Mediterranean

Jeff Rotman / Squid (Loligo sp) swimming at night, Red Sea

Richard Herrmann / Squid (Loligo opalescens) group under gulls, Silver Canyon, Catalina Island, California

Richard Herrmann / Squid (Loligo opalescens) pair mating, Silver Canyon, Catalina Island, California

Richard Herrmann / Squid (Loligo opalescens) group, Silver Canyon, Catalina Island, California

Richard Herrmann / Squid (Loligo opalescens) group, Silver Canyon, Catalina Island, California

Richard Herrmann / Squid (Loligo sp) at night, Nine Mile Bank, California

Nature Production / Spear / Bleeker's Squid {Loligo bleekeri} mating, Izu Osezaki, Shizuoka, Japan, January

Nature Production / Spear / Bleeker's Squid {Loligo bleekeri} spawning, Izu Osezaki, Shizuoka, Japan, January

Nature Production / Spear / Bleeker's Squid {Loligo bleekeri} spawning, Izu Osezaki, Shizuoka, Japan, January

Nature Production / Spear / Bleeker's Squid {Loligo bleekeri} spawning, Izu Osezaki, Shizuoka, Japan, January

Nature Production / Pod of Spear / Bleeker's Squid {Loligo bleekeri} swimming near the water surface

Shane Gross / Opalescent inshore squid (Doryteuthis opalescens) swimming at night, Salish Sea, Vancouver Island, British Columbia, Canada.

Shane Gross / Opalescent inshore squid (Doryteuthis opalescens) swimming at night, Salish Sea, Vancouver Island, British Columbia, Canada.

Shane Gross / Opalescent inshore squid (Doryteuthis opalescens) swimming at night, Salish Sea, Vancouver Island, British Columbia, Canada.

Russell Laman / Caribbean reef squid (Sepioteuthis sepioidea) close up detail revealing the pigment-filled chromatophores, Bonaire, Caribbean Netherlands, Caribbean Sea.

David Fleetham / Caribbean reef squid (Sepioteuthis sepioidea) swimming in shallow water, Caribbean, Caribbean sea.

David Hall / Bioluminescent Caribbean reef squid (Sepioteuthis sepioidea), St. Vincent, Eastern Caribbean.

Alex Mustard / European common squid (Alloteuthis subulata) swims in open water. Hope Cove, South Hams, Devon, England, United Kingdom. English Channel, North East Atlantic Ocean. British Isles.

Franco Banfi / Squid (Loligo vulgaris) Puolo Bay, Punta Campanella Marine Protected Area, Costa Amalfitana, Italy, Tyrrhenian Sea, Mediterranean.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) eating fish at night, portrait. The Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) at night, portrait. The Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) two at night surrounded by Plankton. The Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) surrounded by Plankton at night. The Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) feeding on Shrimp at night. The Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) portrait at night, Eleuthera, Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) portrait at night, Eleuthera, Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) portrait reflecting off the surface of the ocean at night, Eleuthera, Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) portrait at night, Eleuthera, Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) portrait at night, Eleuthera, Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) eating larval moray eel, Eleuthera, Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) at night in The Bahamas.

Franco Banfi / Common squid eggs (Loligo vulgaris) attached to a sea fan, Vis Island, Croatia, Adriatic Sea, Mediterranean