|The Yellow Bellied Sea Snakes|
|Season 04, Episode 18|
The Kelp Monster Mystery
The Coconut Crisis
When a mass of poisonous Sea Snakes get stranded on a beach from a sea storm, one of them stings Peso on his flipper and one of the sea snakes gets a splinter. Peso and the Octonauts must somehow get the snakes back to the ocean by cooling them off with water and building a swimming pool.
- This is the third time that Professor Inkling has not been featured entirely throughout an episode.