Catch fish in The Cistern on Nessus.
A Fishing Pond lies somewhere near a body of radiolarian fluid in The Cistern on Nessus. Look at your map for the exact location where you can cast your line.
Fishing Ponds only appear while public events are not active in the same location.
"Personally, I wouldn't want to fish anything out of a pond of Vex milk. But I'm not a Guardian, now am I?" —Suraya Hawthorne