Neptuna is Lagoona Blue's pet piranha. Lagoona carries her to school in a fishbowl purse.
"Neptuna is my pet piranha and I've got a special purse that's actually a fishbowl so I can secretly take Neptuna to class."
Neptuna is a light pink piranha fish with aqua blue eyes.
Since piranhas are carnivores, she has several sharp teeth and eats other fish.
'Basic' Neptuna is in a standard swimming position. Lagoona's purse is designed to fit her.
- Dead Tired
Dead Tired Neptuna is the same as 'Basic' Neptuna. She comes with a blue and white eyemask.
13 Wishes13 Wishes Neptuna is a light lavender shade, and the scales on her body are a vibrant purple. The black eyeliner around her eyes isn't nearly as intense as 'Basic' Neptuna. She is the same mold as 'Basic' and 'Dead Tired' Neptuna.
Neptuna's Electrocuties toy lights up purple.
- Freakey Ring & Mirror
Neptuna's Freakey Ring & Mirror is aquamarine.