I'm honestly not big on seafood. But Korea has expanded my seafood tastes 1,000 fold. I'll now try just about anything.
A meal like this - with a whole octopus intentionally displayed as the eye-catching feature piece - is very common. Once at a meeting of Cheonan pastors, we had a spicy seafood soup with just about everything that lives in the ocean: all sorts of shell fish, shrimp, crab, actual fish pieces, fish innards (including intestines and ovaries full of eggs), and all sorts of other sea creatures that don't fit into easy categories.
One of Korea's prime delicacies that I haven't tried yet is Saeng Nakji - or fresh octopus. It's so fresh that they bring it to your table fresh out of the tank. Then, they chop it up, and everyone digs in. The tentacles will wrap around your chopstick (even after the chopping), and you have to eat it quickly or the suckers will get stuck in your throat. Apparently, every year a few people die from this. I actually want to try it before I leave. How could you not?