OOOPS! I stand corrected!! Concern over the USAAF's inability to escort B-29s all the way to mainland Japan resulted in the highly classified "Seahorse" project (NAA-133), an effort to "navalize" the P-51.
[nb 12] On 15 November 1944, naval aviator (and later test pilot)
Lieutenant Bob Elder, in a P-51D-5-NA
44-14017, started flight tests from the deck of the carrier
Shangri-La. This Mustang had been fitted with an arrestor hook, which was attached to a reinforced bulkhead behind the tail wheel opening; the hook was housed in a streamlined position under the rudder fairing and could be released from the cockpit.
[53] The tests showed that the Mustang could be flown off the carrier deck without the aid of a catapult, using a flap setting of 20° down and 5° of up elevator. Landings were found to be easy, and, by allowing the tail wheel to contact the deck before the main gear, the aircraft could be stopped in a minimum distance.
[54] The project was canceled after
U.S. Marines secured the Japanese island of Iwo Jima and its airfields, making it possible for standard P-51D models to accompany B-29s all the way to the Japanese home islands and back.
So...I'd say most are standard Mustangs being ferried. The one landing on the carrier is obviously the conversion