I have been to Riddle and Finns twice now; once nearly three years ago, in the early days of my spending a lot of time in Brighton, and again last night. Their online menu (it’s a pdf, I’m afraid. Because restaurants) is a little out of date. On both occasions I enjoyed it tremendously, and I’m reasonably sure that on both occasions I did so by making a wretched mess of myself and the table near abouts, by dismantling an enormous crab. The folks I was with ate lobster and sea bass. We had simple sides, a middling Sancerre, a little dessert, and a gorgeous sweet sherry to round it all off. This set us back about £50 per head, which I felt was perfectly reasonable for the experience, but if you’re less fond of shellfish and/or booze, you could easily spend half that.
Either way, I’d recommend a visit.