It's been awhile since I've fished the shore up north. But, "Generally" most piers have been dredged out to a certain extent to accomodate the boats. You should find bonefish moving in and out of those deeper areas. On a sunny day look for the flashes in the water. Check first with the pier owner though. They may have placed artificial reefs for their snorkling guests and not appreciate you fishing them.

Flyfishing my way through mid-life crisis.