Octonauts — Season 4, episode 16 watch online
Octonauts, season 4 episode 16 «Octonauts and the Coelacanth»: air date May 29, 2017. Episode overview, season trailer and the cast of Octonauts.
The Octonauts, for more deep sea adventures. 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.
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Episodes — Season 4
- 1 Episode 1 «The Poison Dart Frogs» September 23, 2015
- 2 Episode 2 «The Hidden Lake» September 24, 2015
- 3 Episode 3 «The Octopod Mystery» September 25, 2015
- 4 Episode 4 «The Baby Sea Turtles» September 28, 2015
- 5 Episode 5 «The Walrus Pups» September 29, 2015
- 6 Episode 6 «The Mantis Shrimp» September 30, 2015
- 7 Episode 7 «The Loneliest Whale» October 1, 2015
- 8 Episode 8 «The Tree Lobsters» October 2, 2015
- 9 Episode 9 «The Convict Fish» December 14, 2015
- 10 Episode 10 «The Emperor Penguins» December 16, 2015
- 11 Episode 11 «The Baby Gator» March 14, 2016
- 12 Episode 12 «The Bomber Worms» March 14, 2016
- 13 Episode 13 «The Crawfish» March 22, 2016
- 14 Episode 14 «The Surfing Snails» March 22, 2016
- 15 Episode 15 «The Flamingos» March 28, 2016
- 16 Episode 16 «Octonauts and the Coelacanth» May 29, 2017
- 18 Episode 18 «Octonauts and the Hippos» September 20, 2017
- 19 Episode 19 «Octonauts and Operation Cooperation» September 27, 2017
- 20 Episode 20 «Octonauts and the Bomber Worms» October 23, 2017
- 21 Episode 21 «Octonauts and the Kelp Monster Mystery» October 24, 2017
- 22 Episode 22 «Octonauts and the Coconut Crisis» October 25, 2017
- 23 Episode 23 «Octonauts and the Baby Alligator Search» October 26, 2017
- 24 Episode 24 «Octonauts and the Spinner Dolphins» October 27, 2017