This creature is light green with a yellow underside. He has purple ears and wears glasses. He may be a sea dragon.
He appeared in the episode, "SpongeGuard on Duty." SpongeBob called everyone out of the water and everyone was wondering what was going on. He tried to make several excuses. Then he said there were sea monsters in the water. The sea monster appears and says that they are quite friendly. The monster made a brief sentence and walked away, slapping SpongeBob with his tail.