The Pacific Octopuses have a natural capability of detecting colours and have sharp vision. Octopuses have chromatophores on their body and this helps them to blend with the environment. Octopuses have a peaceful temperament and should not be housed with predatory fishes. Octopuses are reef compatible and makes a great addition to any reef tank. But Octopuses should only be managed by an expert aquarist. Octopuses also require large sized tanks of not less than 50 gallons. Octopuses dwell under water at a temperature of 72-78 degree Fahrenheit and 8.1-8.4 pH. Octopuses are carnivorous and they feed on live shrimps, mussels and small fishes. Octopuses come to scavenge at night. Dim lighting is required. During day time fluorescent light can be used. At night dim re LED lights can be used. The aquarium must be provided with plenty of live rocks and hiding places such as caves. Rocks should be well anchored to the bottom of the aquarium to prevent the octopus from toppling over the rocks. It is advised to seal all the tank openings. Like other marine invertebrates, these specimens also need a water medium rid of overdosed copper and nitrate medications. It is very difficult to acclimatize the octopus to a new environment. An octopus defends itself from the enemy by squirting an inky substance. It becomes aggressive if threatened.