The Octonauts and the Coelacanth

The Octonauts and the Coelacanth is the 13th episode in the 4th series of Octonauts.

Plot synopsis
While The Octonauts are exploring a dark cave, They find the fossil of a prehistoric fish, a coelacanth. However, When the fossil mysteriously disppears, Once again they realize that they are not alone...

Appearances

 * Coelacanth
 * All Octonauts

Notes & trivia

 * This is the second episode to be about a creature thought to be extinct. The first being The Octonauts and the Tree Lobsters.