Beautiful octopus. You are lucky to have it. Please don't be upset with Jack or fish supply. We need to remember that octopuses are not like fish. They change texture, color and shape. With over 300 hundred species of octopus and no way of knowing where most of his octopuses were collected, it's hard to give exactly what the customer wants sometimes.If you are really currious and marvel at octopus, then you will have plenty of chances to own a bimac. What you won't always be able to do is get a unique species like the one you have now.
You may find the the behaviour of the species you have now, may be far more facinating than any bimac you keep in the future. Bimacs are cool, but there are a lot of species out there that most have never kept. With imports coming in all the time, you never know what you are going to get.
It could be a member of the horridus species complex. These octopus have some of the best camouflage of any octopus species. They tend to be day active due to their incredible camouflage ability.
Like Colin says, you could have O.aculeatus or you could have O.abaculus. They hail both from the philippines that are common collection areas. You could have a new species? Enjoy and keep us all posted on your new octopus!
-Chris