First, the shark eating people hands is disgusting in the normal, literal sense of the word. I wanted to leave the site as soon as I saw it. I know that the idea is to be funny. There are probably people with a macabre sense of humor. To me, the anthropomorphized shark is down in the uncanny valley. You might lose users on it too.

Second, the fact that I have to create an account to do anything makes this site useless. I've already got accounts on sites that I don't visit anymore, and that I only visited once. I've reached a point that I refuse to get any more such accounts. If a web site is not going to give me at least read access to some of its useful comments, I'm not going to use it.

Without telling your users what your website is about, how can you ask them to signup on your home page ?

I dont like the dropdown interface for reviews. Make it flat like links below your header