Octopus Fight - Reef Life of the Andaman - Part 25

Octopus fight. Part 25 of my DVD, “Reef Life of the Andaman“, available at or view the whole 2-hour video at In this video we encounter a day octopus, Octopus cyanea, attacking another that he unearths from the sea bed at Western Rocky Island in the Mergui Archipelago in Burma (Myanmar). It’s hard to be sure whether the ensuing fight represents a territorial dispute between the two octopuses, or the aggressive mating behaviour of a determined male in pursuit of a female. If you have an opinion either way, please leave a comment. At Richelieu Rock, north of the Similan Islands in Thailand, we see an adult domino damsel, Dascyllus trimaculatus, biting a day octopus. At first it might appear that the damselfish is feeding on the flesh of the octopus, but it is far more likely that the damsel is aggressively defending its nest. Besides “day octopus“, Octopus cyanea is also known commonly known as the “big blue octopus“,