What animal is SpongeBob based on?
Olivia Hensley
Updated on March 02, 2026
Role in SpongeBob SquarePants
SpongeBob is a good-natured, naive, and enthusiastic sea sponge. In The SpongeBob Musical, his exact species of animal is identified: Aplysina fistularis, a yellow tube sponge that is common in open waters.