What is the reward for keeping the Prejek Paddle Fish alive?
Solution 1:
According to the screenshots in this BioWare forum post (and mentioned in another thread, by another player), the reward is a 10% power or weapon damage bonus.
The intel is listed as "Prejek Paddlefish" in the terminal, and has the following description:
This fish is a rare and valuable subspecies of the prejek paddlefish, prized for its rich and savory flavor. The breed is endangered, and a member of the Hanar Illuminated Primacy is offering a choice of rewards in exchange for the fish.