Cobalt Ocean
From YPPedia
The Cobalt Ocean was a subscriber ocean, before its merger with the Midnight Ocean to become Cerulean Ocean. 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.
* - denotes capital
^ - denotes colonized
Ocean History
Cobalt was the second subscriber ocean opened, announced on 2005-02-18 [1].
A brief Cobalt blockade history.