Grande Saline Bay provides temporary anchorage for small vessels while Colombier Bay, to the northwest, has a 4 fathoms patch near mid entrance. In the bight of St. Jean Bay there is a narrow cut through the reef. The north and east sides of the island are fringed, to a short distance from the shore, by a <answer>visible coral reef</answer>. Reefs are mostly in shallow waters and are clearly visible. The coastal areas abound with beaches and many of these have offshore reefs, some of which are part of a marine reserve.
The North and East sides of St. Barts are fringed by what?
visible coral reef