Named after St. Crispin, the French patron saint of cobblers and tanners,[2] St. Crispin's Reef is located 35 miles off the Queensland coast in the Coral Sea,[3] in latitude 16° 07' 54.14" S longitude 145° 48' 22.46" E, at a depth of 9 metres.
[7] St. Crispin's Reef is a popular diving and snorkeling spot for expeditions from Port Douglas and Cairns.
[8] Nicknamed "Flower garden", the reef is host to Sergeant majors, Sweet lips, reef sharks, feather stars and bumphead parrot fish.
[3][9] Classified by the Marine Park Authority for "Intensive use",[10] the reef has four moorings.
[3] In 1998, divers Tom and Eileen Lonergan were accidentally left here by their dive expedition, and went missing.