Chapter 9: Staying hidden:  When you must sneak around the fish with lights on their heads or the ones with torches, there are some tables with cloths on them that you can go under without being detected.

Chapter 9: Avoid being caught:   To avoid being caught by police fish, go into houses until the cops pass.

Chapter 3: Pearls:  If you attack a puffer fish, many pearls will come out.

Invincible Oscar:  Hold L and press A, X, A, Left(2), Y, R, Down, Y(2) at the controller selection screen.

Shorties:  If you cannot beat the Shorties, try following them.

Completing dance mode:  To complete dance mode easier, press A + B + X + Y on each arrow It will count as the arrow that is pointing to, even doubles.

Invincible Oscar:  Hold L and press A, X, A, Left(2), Y, R, Down, Y(2) at the controller selection screen.

Attack mode on at all times:  Hold L and press X(4), A, X(3) or X(4), A, X(4).

Two extra Clams and fame:  Hold L and press X(2), A(2), X, A, X(2).

Replace all Pearls with Fish King coins:  Hold L and press X, A, X(3), A, X(2).

When you are going through the dining room, you can only be seen by the waiters, and not the sharks. Note: Beware of piranhas.

To win in dancing mode, press the buttons when they get to the circle.

Avoiding enemies:  In any chapter, to avoid enemies or to just swim fast, rapidly press B.

Destroyable creatures:  You can destroy crabs, puffer-fish, guard fish, piranhas, electric eels, and angler fish. You cannot destroy jellyfish, sea urchins, bus fish, and long eels.