Game: Happy Aquarium

When it comes to aquarium games on Facebook, Happy Aquarium is easily the biggest fish in the sea. With more than 28 million players every month as of this writing, it's not only the most popular aquarium game - it's the 5th most popular app on Facebook. And yet despite these massive numbers, once you get ankle deep in tank water you can't help but wonder why anyone would find this relatively shallow offering so appealing. Happy Aquarium may be the biggest fish in the sea, but it spreads itself too thin to be considered the best.