I looked back to see Cathy watching the whole affair. I raised my eyebrows to signal my excitement then we both shrugged our shoulders as if this was becoming a normal thing. The Nurse Shark is a member of the order of sharks known as Carpet Sharks. Mostly harmless, this order includes the largest fish in the world, the Whale Shark. Nurse Sharks can reach 14 feet in length.
Nurse sharks feed on small animals living on the bottom.
Around Middle Caicos, this is probably mostly Conch and Lobster. They suck the prey into their mouths and crush the shells with thousands of teeth. They are usually not dangerous to humans unless provoked. They were diving for Lobster on the Caicos Bank south of the islands. He found an opening in the rocks full of them.