King Cruiser is Phuket's famous ferry wreck, an open-water artificial reef between Phuket and Phi Phi that now sits upright and heavily deteriorated in places. It is a true wreck dive rather than a casual reef outing: the wreck lives in current-prone water, visibility is often modest, and the standard recreational plan is to work the outside rather than improvise penetration. The payoff is a dense fish show on and around the hull, with coral growth, schools of snapper, trevally, lionfish, scorpionfish, barracuda, turtles, and zebra sharks making it one of Phuket's signature dives.