Alex Mustard / Mototi octopus (Amphioctopus mototi) emerging from its den inside a bamboo log, Bitung, North Sulawesi, Indonesia, Lembeh Strait.

Alex Mustard / Mototi octopus (Amphioctopus mototi) crawling over the seabed, Bitung, North Sulawesi, Lembeh Strait, Molucca Sea.

Alex Mustard / Mototi octopus (Amphioctopus mototi) moving over the seabed, with two arms raised, Bitung, North Sulawesi, Lembeh Strait, Molucca Sea.

Fred Bavendam / Poison ocellate octopus (Amphioctopus siamensis) moving over debris on the seabed, Lembeh Strait, North Sulawesi, Indonesia. Some backscatter digitally removed.

Fred Bavendam / Poison ocellate octopus (Amphioctopus siamensis) moving over seabed, Lembeh Strait, North Sulawesi, Indonesia. Some backscatter digitally removed.

Fred Bavendam / Poison ocellate octopus (Amphioctopus siamensis) moving over seabed, exhibiting a bold striped colouration, defensive behaviour called a deimatic (alarm) display, used to deter predators, Lembeh Strai...

Fred Bavendam / Poison ocellate octopus (Amphioctopus siamensis) swimming, exhibiting a bold striped colouration, defensive behaviour called a deimatic (alarm) display, used to deter predators, Lembeh Strait, North...

Fred Bavendam / Poison ocellate octopus (Amphioctopus siamensis) with front arms raised in defensive posture, Lembeh Strait, North Sulawesi Island, Indonesia. Some backscatter digitally removed.

Fred Bavendam / Poison ocellate octopus (Amphioctopus siamensis) hiding from approaching Lionfish (Pterois volitans) among the branches of a sponge, Lembeh Strait, North Sulawesi Island, Indonesia. Some backscatter d...

Magnus Lundgren / Mototi octopus / poison occellate octopus, (Octopus mototi), drifting in the pelagic zone on a tunicate (Pyrosoma sp) Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean