From The Mighty Moo: The USS Cowpens and Her Epic World War II Journey from Jinx Ship to the Navy's First Carrier into Tokyo Bay, by Nathan Canestaro (Grand Central, 2024), Kindle pp. 109-111:
The Moo’s southbound course put her across the equator for the first time some seventy miles west of Baker Island on January 22, an occasion that the ship marked with a line-crossing ceremony. In this centuries-old tradition, sailors who have never crossed the equator before—known as pollywogs—are initiated into the “Ancient Order of the Deep” by their more experienced colleagues, known as shellbacks. Filled with farcical ritual, harmless pranks, and old-fashioned hazing, the festivities were a welcome distraction from daily routines and worries about the upcoming operation. In the days before the ceremony, the crew had received occasional warnings from the ship’s loudspeaker system: “Beware all you pollywogs!” On the nineteenth they received a legal summons from King Neptune himself, warning the Cowpens was approaching his royal domain:
...
In advance of King Neptune’s arrival, his shellbacks relieved Captain McConnell in a bloodless coup and took command of the ship. The air group’s senior officers were forced to serve lunch in the enlisted men’s mess, while many of the junior officers were assigned meaningless tasks, such as calling the bridge every five minutes to report on temperature. For his part, newly arrived pilot Ed Haley was stationed on the forecastle with a pair of beer bottles for binoculars and ordered to scan the horizon for the Royal Party.
Streaming seawater and festooned with seaweed, Neptune and his Royal Court—all of whom bore a suspicious resemblance to several of the Moo’s saltiest chief petty officers—planted themselves on the flight deck and bid the lowly pollywogs to do them homage. A group of Royal Bailiffs rounded up the pollywogs and herded them to the flight deck. Some did not go quietly; Art Daly and some cohorts ambushed several shellbacks in advance of being dragooned, engaging in a bare-fisted skirmish with officer and enlisted alike. There was nearly a large brawl on the fantail between the two groups before a passing officer warned them to knock it off. In another instance, some mutinous pollywogs roughed up a couple of Neptune’s royal cops, and shellback reinforcements restored order by spraying down the melee with fire hoses.
George Terrell described how the pollywogs were rounded up and then led single file up to the flight deck by a group of shellbacks that he called the “Judas Battalion.” Once there, “we were beaten to our knees with blivets by our merciless captors, formed into creeping columns,” and, with further whacks with wooden paddles, encouraged to move forward.” With Captain McConnell watching the proceedings from the bridge with a bemused look upon his face, the pollywogs were force-marched to the Royal Court’s red carpet. This was a target sleeve, a fabric tube thirty inches in diameter and thirty feet long, normally towed behind an airplane as target practice for the ship’s gunners. Unfortunately, the pollywogs were not to walk on it, but crawl through it, and the sleeve had been loaded with stinking garbage and slop from the ship’s galley for the occasion. With further encouragement from the paddles, the pollywogs dove headfirst into the sleeve and crawled through thirty feet of muck. “Do you know how fast you can move on your hands and knees?” wrote Terrell. “Would you believe thirty feet in 15 seconds? Records were set and broken in rapid succession.”
Finally, the pollywogs were introduced to King Neptune and his entourage, bedecked in robes, wigs, and gold-painted cardboard crowns. The most colorful member of the court was the Royal Baby, a fat, balding, half-naked chief petty officer in a diaper and covered in axle grease. Each pollywog was forced to his knees in front of the baby, who took a handful of lubricating grease from a drum at his side and rubbed it all over his sweaty abdomen. Then came the order: “Kiss the baby’s belly!” If the pollywog hesitated, a shellback bailiff delivered a whack to his backside. “I closed my mouth and eyes,” recalled Sam Sommers. “I wish I could have held my nose.” Accepting the kiss as tribute, the Royal Baby haughtily waved on the pollywog, with his paddle-wielding bailiffs making sure he cleared out quickly to make room for the next victim.
The final stop was the Royal Barbers and their merciless clippers. Each pollywog ended up with a highly unconventional buzz cut that left his hair in tatters. “They were real artists,” said Marine George Terrell. “A thousand haircuts to be given and no way were any two going to be alike.” Some sailors emerged with a Mohawk or bird’s nest (bald on top, with a fringe around the bottom), but the barbers also sometimes amused themselves by spelling C-O-W-P-E-N-S or V-I-C-T-O-R-Y on successive heads. Sailor Robert Lee attempted to evade the royal clippers with a preemptive head shaving, but soon found out “it doesn’t pay to be smarter than King Neptune. For punishment I had my head and body smeared with a combination of oil and eggs and had to stand on the bow of the ship for one hour in the sun. Did I have fun taking the oil and eggs off my head and body with cold salt water. I learned my lesson.”