Photo copyright Tim Nicholson.
Taken in the Egyptian Red Sea.
The octopus is solitary. Mating can be risky for the male: he is smaller than the female and risks being attacked. The female watches his body postures and skin pattern. Once accepted the male stretches out a modified arm towards the female - shown in our photo. The arm has grooves along which sperm passes to the female's mantle cavity.
by Martin Edge, Paperback, 536 pages (2009)
The Brains and Lives of Cephalopods
by Marion Nixon, John Z. Young, Oxford University Press, Hardback, 480 pages (2003)
Recommended Video: BBC World Of Wildlife 7 - Squid And Octopus
David Attenborough and Mike deGruy
Recommended DVD: The Blue Plane6t