There is a scene where one crew member is implied to be swimming nude. Nothing is shown but tops of breasts are briefly visible in close up shot.
Lucius is shown sketching Fang after tricking him to get out of work. The camera cuts to behind Lucius and it's shown that he has drawn Fang's penis and testicles. The drawing is clearly seen from a close angle and is fairly graphic.
There is a character who spends much of an episode in the nude. His backside is on full display several times.
Buttons can be seen naked, but only his behind is shown. The front of his body is not shown.