In this episode we did not get as many calming scenes as in the previous parts, mostly because of the fact this episode deals with how fragile the south Pacific actually is, about solutions to preserve what we are left with and dangers looming with population grow. However, we met a sea snail, called sea butterfly that uses elongated leg to well, kind of fly in the sea (it's nicknamed as: potato chips, because it's so widespread and eaten by almost everything bigger than itself), a female tiger shark nicknamed Scarface that's inquisitive but doesn't bite the spectators.
In the whole - it was a really nice, informative series.
Beware - there be sharks.
Enjoy!