Fresh Wharf is the second stage in Sea of Tuna.
The Enemy's Castle will spawn 2 Master A.'s.
During the Battle
Use cats with high speed, AoE (Area attack) and high attack power to deal some quick and heavy damage. Some example of these are Gang Cat and Valkyrie Cat. After the enemies have sustained some decent damage and are quite close to your base, you should release some long range expensive cats to knock them back and deal some very heavy damage to them. One example of this is Bahamut Cat. After this you should summon in all of your other cats to create a final cluster of many cats to finish them off.
Summon in tanky cats such as Wall Cat or Bronze Cat repetitively while saving up for strong, ranged cats such as Dragon Cat and Valkyrie Cat. These should hold back the two Master A.s while also dealing large amounts of damage to them. Remember to fire your Cat Cannon as soon as it reloads as this is a very effective way of knocking them back. Continue this until they either die (A) or get to your base (B).
(A): Kill off the remaining enemies using Cats with AoE (Area attack) and take down their base.
(B): Send out every cat you can afford that deals AoE (Area attack) and deal damage to the bosses as quickly as possible and finish them off. Then destroy the base.