Frozen Tuna Front is the seventh stage in Sea of Tuna.
During the Battle, the Enemy's Castle will spawn a group of Doge Dark, Duche,Celeboodle, Dagshund, St. Pigge the 2nd, Metal Hippo, Those Guys, Master A., all of them will respawn after defeated for a short time
(require Cats in a Box and luck). begin the battle, upgrade the Wallet to level 2. Spawn immediately 2 princesses right after the enemy appears, player will kill the Doge Dark and non-stop spawning Dragon Cat, mass production Macho Cat after Dragon Cat's production. Spawn Bahamut Cat after Dragon Cat defeat the Celeboodle. Spawn Wall Cat and Giraffe Cat instead of Macho Cat, the attack of Bahamut Cat will hit Duche, Doge Dark and knock back St. Pigge the 2nd. Spawn Cats in a Box right after the St. Pigge The 2nd dies, timing is very important. Metal Hippoe will be knocked back by Giraffe Cat. Bahamut Cat will attack Master A., Macho Cat mass production resumed from this moment. The new group of enemy appears and most of them will die after Bahamut Cat's attack, summon Valkyrie Cat. Starting to knock down the enemy's castle before the Master A. repawns in deadly numbers.
(require Boogie Cat, Kung Fu Cat and Mr.) cat Line up: Macho Cat, Boogie Cat, Wall Cat, Valkyrie Cat, Bahamut Cat, Dragon Cat, Kung Fu Cat, Brave Cat, Mr. and Giraffe Cat. to kill the enemies before Bahamut Cat, use Macho Cat, Boogey Cat, Wall Cat and Valkyrie Cat. After Bahamut Cat's attack, spawn Kung Fu Cat, Dragon Cat, Wall Cat. Produce Mr. and Giraffe Cat when Metal Hippoe comes out in front.
Cat line up: Macho Cat, Wall Cat, Sexy Legs Cat, Dragon Cat, Valkyrie Cat and Bahamut Cat. Begin the battle, spawn Macho Cat and Wall Cat, Spawn Dragon Cat and Doge Dark will die before Celeboodle arrive at the front, spawn Bahamut Cat when St. Pigge the 2nd. reach the front, the first attack of Bahamut Cat is success if it hits St Pigge the 2nd. Spawn Sexy Legs Cat, Dragon Cat and Valkyrie Cat from the obtained money. Start spawning Dragon Cat and Sexy Legs Cat, but the player should save money for Bahamut Cat and Valkyrie Cat, player can postpone the production of Dragon Cat and defeat the first Master A. before it overlaps. 
Strategy 3 but using Titan and Swordsman is a good strategy. Also use Cow to take down the Metal Hippoe