Clayton
Lieutenant Clayton was a male Human Starfleet officer who lived during the mid-23rd century. He served in the operations division aboard the  under Captain James T. Kirk, during a historic five-year mission that starship undertook. 

In 2269, Clayton piloted the aqua-shuttle from the Enterprise to the surface of the planet . During the mission he was ordered by Kirk to open the shuttles hatch so Dr. McCoy and Spock could retrieve seawater and algae-specimens. 

Just as he was preparing to open the hatch, the shuttle was attacked by a sur-snake and Kirk ordered Clayton to stun the creature with the shuttle's phasers. Kirk then ordered Clayton to submerge the shuttle so that they could study the creature before the stun effects wore off. 

While studying the sur-snake, it suddenly awoke and, again, attacked and eventually destroyed the shuttle. During the encounter Clayton and McCoy were thrown clear of the wreckage, and survived with no apparent injuries. 

During the next five days, Clayton assisted Lieutenant Commander Scott in the search to recover Kirk and Spock, by piloting the scouter-gig, and would later locate the aquashuttle. 

After returning the planet again to search for the inhabitants of the planet, he would again pilot the scouter-gig, and later take command of it when Scotty was forced to locate Kirk and Spock of an impending seismic disturbance. ()

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Humans
Starfleet operations personnel
USS Enterprise (NCC-1701) personnel