day octopuses ( common reef octopus or big blue octopus ), Octopus cyanea, mating; male, on left, extends dark hectocotyl arm or hectocotylus into man

---

day octopuses ( common reef octopus or big blue octopus ), Octopus cyanea, mating; male, on left, extends dark hectocotyl arm or hectocotylus into mantle of female, on right, to deposit spermatophores; Kohanaiki, North Kona, Hawaii Island ( the Big Island ), Hawaiian Islands, ( Central Pacific Ocean )

---

Size: 8256px × 5504px
Location: Kona, Hawaii, USA
Photo credit: © Doug Perrine / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ..., arm, big, blue, camouflage, camouflaged, central, cephalopod, cephalopoda, common, courtship, cyanea, cyanes, day, doug, hawaii, hawaiian, hectocotyl, hectocotylus, hee, invertebrate, island, islands, kohanaiki, kona, life, marine, mating, mauli, mollusc, mollusca, mollusk, north, ocean, oceania, octopoda, octopodidae, octopus, octopus-day-21, pacific, perrine, polynesia, reef, reproduction, sea, sex, states, underwater, united, usa