Here is a submarine ride in Maui.  Looks pretty cool check it out  Website

Maui Black sand beach. Click here for location
Nice restaurant in Maui Called Monkey Pod.  Click here for location   Website
The Maui Ocean Center Click here for location Website
Get full Snorkel gear for as low as $9/WEEK at Snorkel Bobs 6 Locations in Maui
Boat ride with Dolphin and Snorkel Adventure from Lahaina to Lanai $89