2017 · ソースブック（プレイを拡張するルール／オプション）
Trueforms
This roleplaying supplement expands the Cerulean Seas Campaign Setting and Pathfinder Roleplaying Game with playable aquatic animal races. It includes twelve trueform races, including three new options, along with feats, equipment, mechanical inventions, and other rules for creating sapient sea-animal characters. The material supports aquatic adventures and is presented with character options and additional setting content.
スキルベース（スキルを購入または獲得）属性／ステータス制（STR、CON、PERなど）レベル制（XPを獲得してレベルアップ）
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。