I was there last monday (monday 4th January), it hasn't changed one bit since i visited around three years ago! I noticed in the "mangrove" section there were some american alligators that i didn't expect for some reason! They had two species of otter, the canadian and asian short clawed. Children and parents alike were splashing wildely and pulling the ray's towards them in the "Ray Cove" when the fish swim past regardless that a member was standing right there! All in all, i love blue planet aquarium and always have! but it is very much like other aquariums and there i would agree that Chester Zoo has way more interesting species in their aquarium.