"When I want you to sound off, Golden Bell, I'll pull your rope"--Harlow to Yu-Lan in "China Seas." There's not another actor, alive or dead, who could make that line work, but Harlow finds both the obvious comedy and the hidden pathos in it. (The pathos stems from her realization that she's out of her league, and her fear that the others at the table are looking down their noses at her.)
She, Gable, and Wallace Beery, are perfectly cast here. Harlow is the sassy, brassy, slightly shady blonde who's impulsive and emotional, but who really wants to do the right thing. Gable is of course steady and solid, all man, in charge, unflappable, ironic, and irresistible. Beery is by turns roguish, charming, tough, and menacing.
Roz Russell does a fine job as an old flame of Clark's who shows up for the voyage. Her British accent holds up pretty well. Lewis Stone plays the cowardly 3rd Officer who is out to repair his reputation, a far cry from his future as Judge Hardy. And Robert Benchley does his familiar drunkard routine.
Besides being well-cast, the film is exciting, with tropical storms, piracy at sea, and complicated romances. The special effects are excellent for the era, and the pacing is lively. Really a fine film.