Just a short swim from French Twist is Hard Bottom Cave. This is a small swim-through in the middle of the main reef and separates the spur and groove formations on the North end of French Reef from the pinnacles and caves on the South end.
The cave itself is often filled with small bait fish with schools of parrotfish and grunts nearby. Squirrelfish, Spiny Lobsters and Eels are also common here.
At 25 to 30 feet this site is ideal for all levels of divers and provides plenty of willing subjects for photographers.