Retrieved during Czech Tourist Club event when we should meet at the top of Bukovec hill (near the cache).
Unfortunately, the organizers decided that they are too lazy to climb the hill and stayed at the rest place about 4 km from the top ... it was only a coincidence that I've got this information and that I was not waiting at the top of the hill for them for ages :)
PS: unfortunately, it seems that the Bubble fish has morphed into the blue pen (I checked with capjar and he had already placed the pencil into the cache)