Quote from Facebook:
Seas and oceans are thundering! They are putting out a challenge to all fishermen. Pick up the gauntlet and earn rewards in the new ‘Seas and Oceans’ competition.
The competition takes 3 days and is not a part of the Ancient Series. The next part of the Series will take place at the end of March. Keep up to date and check your inbox in the game for new messages! Have good catches!