«You may spend a whole hour near an underwater rock before you can notice an inconspicuous living creature lurking in the thickets».
This film is about protective coloraton of marine invertebrates of the White Sea.
Underwater video by Anton Makarov.
We present the second episode of popular science footage of the White Sea animals:
https://black-sea-cat.livejournal.com/3298.html
The fist episode about the White Sea inhabitants and the underwater video shooting process is here: