Weird Japanese Seafood

Hi. chinchoy. I don't know what kind of soup this is, but it looks very disgusting. If I had to have seen something like this served in a Japanese restaurant I would never touch it. I love Japanese food, but this dish is surely not one of them.

I don't know what these are but they look to me like a kind of barnacle, an animal which roots itself in one position (on underwater rocks or wood) and feeds by gathering plankton with feathery tentacles which emerge from the shelly bits at the top. To me, they suggest the kind of food of which it could be said 'I will try anything once, provided I am hungry enough!' The second and third photos on this page: http://fabiokita-unsoed.or.id/reprabowo/2010/04/edible-barnacle-artful-and-tasty/ show something very similar (but, apparently, in a Spanish or Chilean market) called Percebes. In Japanese, they are called 'turtle hand' - Kamenote fujitsubo.