Tansui was seen amongst the Sun Pirates. During their time roaming the seas, the Sun Pirates battled Marines numerous times. One day a former human slave named Koala boarded their ship to return to her home in Foolshout Island. During her time with the Sun Pirates, Tansui, Gyaro, and Macro got attached to the girl. When she finally returned to her home, the three fishmen emotionally cried during her farewell. After Koala returned to her family, the Sun Pirates were ambushed by the Marines. They lost their ship and Tiger was badly wounded during the battle. Tiger soon died from his wounds and Arlong was later captured. Tansui was then under the command of Jinbe. After Jinbe’s acceptance into the Shichibukai and Arlong’s release, Macro, Gyaro, and Tansui left the Sun Pirates and became their own crew.