During MIT Mystery Hunt 2016, there was a copy of the hunt index site here pointed to by the puzzle Haddock Walk, which claimed something was fishy. At the time, this was an exact copy of the original index except for an added keyword and some added links to existing keywords. The puzzle contains clues to help you find them.
For various reasons, I am not leaving the thousands of individual static files which make up that copy of the index online as they originally were, but if you would still like to solve the puzzle, you can download the fishy index here.