THere are several "striped" octopus. What are generally coming into this country right now are from Indonesia and they are frequently called "zebras". Most are "wunderpus" although occasionally the much rarer "mimic" will show up. I certainly would not recommend purchasing either. Several of us have written about this problem for years, but the message does not seem to be getting through. These are delicate, rare animals that do not generally do well in the home aquarium. At pricies up to $500 a piece for an adult, you are probably going to end up paying $10-20 a day for the priviledge of watching one die in under a month and that those prices, most collectors, importers, and retailers don't seem to be able to resist the lure of a quick buck. I saw my first mimic brought into the US in the late 70's and didn't see another until five or six years ago. Now I've seen more for sale locally in the Bay Area than I have in my entire life in the field. I think most cephalopod biologists who work in SouthEast Asia agree that wunderpus and mimic populations cannot sustain this level of collecting for very long. Please pass on the urge to purchase one. You will only be fueling the fire that will seriously impact these incredible animals.
There are several other striped octopuses that are also known occastionally as "zebras". There are at least two that occur off the Pacific coast of Mexico and Central America (although to my knowledge not California). The best known of these is Octopus chierchiae, a dwarf species with brown and tan stripes. I collected several of them in Pamana in the early 80's, but I know of only one report of anyone seeing one in the last 10 years. What makes them so unusual is that females do not die after reproducing and can lay multiple broods. We would love to try to culture these animals, so if you ever hear of one, please contact me or some other cephalopod biologist.
There are equivalent striped species in the southwest Caribbean, but almost nothing is known of them.
Roy