The Blue Marine, the submarine used in only the Aquas mission, is the only vehicle utilized by the Star Fox team in Star Fox 64 to not have been designed by Space Dynamics. It was instead a personal project designed by Slippy Toad, who scrapped it together using discarded parts. He also used maintenance Arwing parts, such as the laser cannons and rolling mechanism.

This information also appeared in the Star Fox 64 Official Player's Guide. However, it would also bolt on the fact that Beltino Toad, Slippy's father who was first mentioned on the Japanese website for Star Fox 64, helped him create it.