Small but ok
Like someone else said. If ya have a hour or even less to spare before reservations or catching a bus, then ya cant really go wrong. I enjoyed the jellyfish exhibit, and thought it was neat seeing them up close like that. The other aquariums look like something in the fish section of a petstore, though. There was 2 seals outside our daughter loved, but honestly, if ya wanna see a real aquarium, have dinner at the Oceanarium (whatever it was) resturaunt, where you can eat right beside hundreds of fish, large sharks and stingrays.
Overall though, the Waikiki aquarium isnt all bad, but I wouldnt visit again anytime soon.