The quest giver (Jang) to turn in Tastyfish for coin is currently broken. She is not giving out the quest to turn in Tastyfish. Nobody can sell their excess tastyfish.
Also, please either fix the main quest giver (Riggle Bassbait) from allowing multiple winners per week OR remove the restriction and allow everyone to do the quest. Afterall, you are allowing everyone to get rank 14, so why not allow everyone to get the fishing pole and/or trinket from the fishing event?
Edit:
Great! You fixed it by respawning the NPCs.
The problem is that you also respawned Riggle allowing someone else to win the fishing tournament today. FFS, Just remove the limit to allow everyone to turn it in.
Edit #2.
One week later and the fishing extravaganza was again broken.