The Cobalt Ocean was a subscriber ocean, before its merger with Midnight to become the sole subscriber ocean, Cerulean. Cobalt is now positioned (in its entirety) to the west of Midnight. There are three archipelagos, each with eighteen islands for a total of fifty-four islands. It has the same geography as the now-defunct Crimson and Viridian Oceans.
Cobalt was the second subscriber ocean opened, announced on 2005-02-18 . It merged with Midnight on January 31, 2012 to become Cerulean.
A brief Cobalt blockade history.