Bonus Pet #1: BrinkleySee Full Article: Brinkley
Cost: 20,000 Shells
Bonus Pet #2: NostradamusSee Full Article: Nostradamus
Nostradamus the Nose is a nose-shaped fish. It drops snot that you can click on for 1$ or 1 Shell, and it can eaten by Guppies, which will turn the Guppy itself into another Nostradamus. He can also stop Alien attacks by sneezing right before they happen.
Cost: 25,000 Shells
Bonus Pet #3: StanleySee Full Article: Stanley
Stanley the Startlingly Small Sea Serpent throws balls at Aliens and their projectiles.
Cost: 30,000 Shells
Bonus Pet #4: Walter
See Full Article: Walter
Walter the Penguin shoots out a boxing glove when clicked on, which does the following:
1. If the object that is punched is a pet, it will make the pet perform its ability.
2. If it's a Breeder, it will create a baby guppy. Note that this does not work in Virtual Tank.
3. If it's a fish, it will produce money.
Costs: 35,000 shells