A wunderpus octopus (Wunderpus photogenicus).

Ostensibly this octopus is rare;  we saw 6 of them at Lembeh.

(Jahir 1, Lembeh Strait, Sulawesi, Indonesia)

mollusk; cephalopod; octopus; wunderpus; Mollusca; Cephalopoda; Octopoda; Octopodidae; Wunderpus photogenicus, South Pacific