Good idea to be certified prior. I'm looking to dive Hawaii (Maui) so have pulled a local dive pub from one of the local shops. Best book pubs are the Lonely Planet Series (google Lonely Planet Tahiti, google Lonely Planet Hawaii). You may also want to get some fish id cards or Fish Flips (google Fish Flips Hawaii).
As to what to see depends on sites on island. Like land, terrain varies U/W and fish vary with terrain.
Originally Posted by divegirl84
No, actually, I am not certified. At least, not yet. I have one more class and then two days of certification dives before I am completely scuba certified. However, I will be certified well before I take my trip to Hawaii and Tahiti. I just wanted to know if anyone had been there and when I might expect to see.