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I would maybe check with the guys at The Fish Store on Roosevelt. Although they don't have octos in the store, they are very knowledgable and would probably have some info to help you. The aquarium is also probably a good resource, but beware, some volunteers there are just high schoolers who don't know too much. Funny story about one of the aquarium's octos, it was sneaking out of its tank and eating fish in the night! The disappearances were a mystery until someone spotted it one night!