Warning Blood in the Water Spoilers.
|Seen||Blood in the Water|
|Mentioned||Straits of Hell but not named|
|Location||Just south of Java.|
|Inhabitants||League of Tripoli garrison and Lemurian prisoners abandoned later in BITW.|
Christmas Island is the League of Tripoli's Covert Base in the Indian Ocean. Mentioned but not named in Straits of Hell, described and later abandoned in Blood in the Water. See: https://en.wikipedia.org/wiki/Christmas_Island for location and our world description.