There are some great scuba spots all over Aruba, and many are from the shore. One of my favorites places was on the NE side of the island above the high-rise hotels (past Marriott). You will see plenty of Pelicans on a rocky terrain, and not many people Scuba there from the shore, but you'll see the party boats parking near by. You see several sand ramps cut into the rocks. Don't worry if nobody is there the water is calmer than it looks and you can go out rather far from the shore and up and down the coast for some distance. You see rocky bottoms full of fish and sandy bottoms with hidden treats for the sharp-eyed. My brother and I spent 3.5 hours head down in the water one day. Hint, dive down grab some bottom seaweed growth and hold it tight to your hand, you can feed the bright yellow fish that will approach if you float still. This is best near where the Pirate party boat always stops. Then there is Bebe beach, which was pretty good, and a few spots on the SW corner of the island. Also, contrary to what I had heard, Aruba does have some good scuba. I went solo with a company called Mermaid Diving; it is a smaller operation but good dive masters and fun smaller groups. You can also get deals buying multiples, and can add on more at bargain prices if you want to continue (I did 8 dives over three days).