Type these in the cheats box in the pause menu. Cheats null your score.
ULTRAVOLVO: Makes you reach the last stage of evolution instantly.
INVINCIVOLVO: Makes you invincible.
ENDINGVOLVO: Next fish you eat makes you skip to the ending.
ETERNIVOLVO: Game doesn't end when you reach max size.
CHANGEOLVO: Select custom settings for your game.
FISHOLVO: Restart the game as any fish!
SAFEOLVO: Removes all hazards ( nets, crab cages and barrels)