Common name: Big blue octopus

General information

The Day Octopus, Octopus cyanea, also known as the Big Blue Octopus, is a remarkable cephalopod known for its intelligence, ability to change color and texture, and complex behaviors. This species is a master of camouflage and can be a fascinating addition to a large, species-specific aquarium.

Care

Octopus cyanea requires a spacious tank with plenty of hiding spots and a secure lid, as octopuses are known escape artists. They are sensitive to water quality and require a well-cycled, stable environment with efficient filtration. Their diet should consist of a variety of live and frozen seafood, and they benefit from environmental enrichment such as puzzles and toys to engage their intelligence.

Reproduction

Breeding Octopus cyanea in captivity is challenging. After mating, females lay eggs and tend to them until they hatch, after which the female typically dies. The care of the larvae is complex, as they need small, live foods and stable water conditions.

Symbiosis

While not known for symbiotic relationships like clownfish and anemones, Octopus cyanea does interact with its environment in complex ways, often using shells and debris to create shelters or to hide from predators.

Habitat

The Day Octopus is found in the Indo-Pacific region, from the Red Sea to the Eastern Pacific. It prefers coral reef and rubble habitats where it can hunt during the day and retreat to its den at night.