I am currently doing an Open University (distance learning) course called 'Life in the Oceans: Exploring Our Blue Planet'. It's a good course, and I will post further thoughts on it once I have submitted my assignment at the end of this month.
In the meantime though, I wanted to post about something I found truly beautiful and astonishing. As part of the course, I have been watching David Attenborough's 'Blue Planet' series, and one sequence stood out for me. In the episode entitled 'Open Ocean', DA touches briefly on the mysterious comb jellyfish. Comb jellies live right in the depths of our oceans, and through a phenomenon called bioluminescence they put on the most incredible light displays.
I cannot find the sequence itself on the web, but here is an example of their beautiful rainbow colours (with appropriate spacey music):
Gorgeous, gorgeous creatures, no?