Aired: June 13, 2016 | Season: 4 | Episode: 20
Overview
Runtime: 11m
Directed by:
Written by:
Description
While exploring a dark and spooky cave, the Octonauts discover the fossil of a powerful, prehistoric fish... but it may be more than just a fossil.
Season 4 Episode 19
The Loneliest Whale
Season 4 Episode 21
The Coelacanth