Franco Banfi / Humboldt squid (Dosidicus gigas) attracted to 'squid jig' bait which glows at night off Loreto, Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

Franco Banfi / Humboldt squid (Dosidicus gigas) at night off Loreto, Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

Franco Banfi / Scuba diver and Humboldt squid (Dosidicus gigas) at night off Loreto, Sea of Cortez, Baja California, Mexico, East Pacific Ocean. August 2007.

Franco Banfi / Humboldt squid (Dosidicus gigas) cannibalising another squid of the same species at night off Loreto, Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

Franco Banfi / Humboldt squid (Dosidicus gigas) at night off Loreto, Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

Franco Banfi / Mexican fisherman boat at dusk, fishing Humboldt squid (Dosidicus gigas) , at night off Santa Rosalia, Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

Franco Banfi / Beak and tentacles of Humboldt squid (Dosidicus gigas) at night off Loreto, Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

Mark MacEwen / Firefly squid (Watasenia scintillans) close to beach during mating season. Toyama Bay, Japan.

Aflo / Deep sea squid (Chiroteuthis imperator) dead specimen floating, Osezaki, Shizuoka, Izu, Japan.

Nature Production / Luminescent Dwarf Squid (Watasenia scintillans) Osezaki, Shizuoka Prefecture, Japan

Tony Wu / Firefly squid (Watasenia scintillans). Toyama Prefecture, Honshu, Japan. March.

Solvin Zankl / Fisherman hauling up glowing nets of florescent Firefly Squid (Watasenia scintillans) at night. Toyama Bay, Namerikawa, Japan, May.