Nudi Retreat I, Lembeh Strait, Sulawesi, INDONESIA
Date 15 October 2009, 05:03
Source Day Octopus (Octopus cyaneus)
Author Bernard DUPONT https://www.flickr.com/people/65695019@N07 from FRANCE
Source: https://commons.wikimedia.org/wiki/File:Day_Octopus_(Octopus_cyaneus)_(6072964169).jpg

The big blue octopus or day octopus (Octopus cyanea) is an octopus in the family Octopodidae. Octopus cyanea is found on reefs and in shallow waters in the Indo-Pacific. Its range extends from the Red Sea, the East African coast, and Madagascar, to southeastern Asia, Oceania, and as far as Hawaii.