Alex Mustard / Shoal of three Bigfin reef squid (Sepioteuthis lessoniana) in open water at night. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Bigfin squid (Sepioteuthis lessoniana) hovering in mid water at night. Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.

Alex Mustard / Portrait of Bigfin squid (Sepioteuthis lessoniana) hovering in open water above a coral reef at night. Dampier Strait, Raja Ampat, West Papua, Indonesia. Tropical West Pacific Ocean

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

Juergen Freund / Bigfin reef squid (Sepioteuthis lessoniana) blurred motion photograph, Kimbe Bay, West New Britain, Papua New Guinea.

Constantinos Petrinos / Bigfin reef squid (Sepioteuthis lessoniana) schooling parallel to one another. Lembeh Strait, North Sulawesi, Indonesia.

Alex Mustard / Long exposure of a bigfin reef squid (Sepioteuthis lessoniana) in open water at night. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea..

Alex Mustard / Bigfin reef squid (Sepioteuthis lessoniana) at night. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Bigfin reef squid (Sepioteuthis lessoniana) with a captured rabbitfish (Siganus sp.) in its arms, at night. ;Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

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

Magnus Lundgren / Wild Wonders of China / Bigfin reef squid (Sepioteuthis lessoniana), Green Island, a small volcanic island in the Pacific Ocean , Taiwan

Magnus Lundgren / Wild Wonders of China / Bigfin reef squid (Sepioteuthis lessoniana), Green Island, a small volcanic island in the Pacific Ocean , Taiwan