A bigfin reef squid (Sepioteuthis lessoniana) descends from open water to the reef at night. Reef squid are less streamlined and bulkier than other squid, and are easily confused with cuttlefish, hence the first part of their scientific name. They have a voracious appetite, devouring about half their body weight a day in small fish, shrimps and crabs in Triton Bay, Indonesia

A basking shark (Ceterhinus maximus) filter feeding in plankton rich waters around the Island of Coll in June in the Inner Hebrides, Scotland

A school of blackfin barracuda (Sphyraena qenie) form the number six as they circle in deep water adjacent to a coral reef in Yolanda Reef, Ras Mohammed Marine Park, Sinai, Egypt