In this episode we had many many islets and atolls that were once domineering volcanoes and now they are slowly sinking under the waves.
There was also a marvelous scene of penguins swimming just under the surface filmed from below the whole and they truly looked like a flying squadron of tiny fighters. Surreal.
I spared you big-eyed small-eyed spider that lives in the volcanic lava tubes. And yes, that's its name, for real.
Enjoy!