Common Octopus   (Octopus vulgaris)
Phylum: Mollusca, Class: Cephalopoda
Range: Tropical Seas Worldwide
Size: 30 in.    Space:: 150+ gal.     Diet: Crustaceans, fish, bivalves
Reef Safe: No   Care Level: Difficult   Temperament: Caution
Natural History: The Common Octopus is the most commonly encountered octopus on reefs. It is nocturnal and will hide by day in a lair that it finds or constructs. It is a highly adaptable animal and is found in nearly all types of tropical reef zones and substrates. It is capable of changing color to match the substrate that it is resting on. It is highly intelligent and has an extremely fluid body, capable of slipping through cracks and crevices that are much smaller than its body diameter.
Husbandry: The Common Octopus should be housed in a large aquarium with plenty of live rock for it to hide within. It is very intelligent and will learn to recognize its owner, even venturing out during the day in anticipation of a meal. The aquarium MUST have a lid that is totally escape-proof. This species can even unlatch an aquarium lid to escape! The Common Octopus must be housed solitary or with fish much larger than itself. It will feed on all ornamental crustaceans, molluscs, and small fish.

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