The most heavily-dived site in the strait, this is a lovely coral bowl in the shallows, turning into a sand slope with encrusted boulders down below with two walls stretching out to either side, sporting healthy soft coral growth right up to only 2 meters in depth. The prime attractions here are pygmy sea horses and sea moths along with the attractive underwater scenery and general variety. Nudi Retreat is named for the large variety of nudibranchs that can be found there, suggesting jokingly that the site might be a retreat or a "spa" for nudibranchs.