If you’d like to add one of these slow-growing fish to your tank, it’ll cost you 8 Sand Dollars to do so. The fish grows to maturity in 5 days, at which point you can sell it for 8,000 coins. You’ll earn a nice 800 experience points for purchasing one of these fish.
As usual, the “limited edition” in FishVille translates to a time limit on the availability of the fish, and here, we’re left with a time limit of a little more than 5 days before the fish will disappear from the store, presumably forever. If you’d like to grab one of these fish before that happens, head over to the game’s page.