Citadel: Krogan Sushi

This assignment can be found on level 27 of the Citadel. Two Krogan across from the gift shop can be heard arguing over whether there is fish in the water in the lake on the Citadel. Go upstairs to level 28 and enter the Dark Star dance club. A Turian who is a Citadel Groundskeeper can be found on the right side of the club. Talk to him and ask about the fish. After that, return to level 27 of the Citadel and talk to the Krogan to complete this assignment.