We have kept several species of octopus from O. cyanea to Hapalochlaena, but I think I now have a new favorite. Three months ago we collected a tiny O. rubescens with a mantle length under one cm. I put it in a 10 gal tank with a sand bottom and a small piece of pvc. The entire set-up was in a temperature controlled room kept at 15 C. The animal was very shy at first, but did eat large adult brine shrimp and tiny bits of raw shrimp. It gradually grew to about 2 cm in two months and was feeding on live ghost shrimp when I left for a month in the field. When I returned this weekend, the animal was 4 cm, ravenous, and runs down grass shrimp, crabs, stomatopods and just about any other live food we put in its tank. When I enter the room it displays and paces on the front wall of the aquarium. It was one of the easiest animals to rear we have ever had and looks to have a broad repertoire of displays. If you ever get a chance to rear one and can keep it in a cool tank, I would strongly recommend this species.