A panorama of undersea views follow, including shipwrecks, underwater grottoes, huge shellfish, sea nymphs, sea monsters, starfish, mermaids, and a ballet of naiads. The ballet is interrupted by Yves, whose inexperience with submarines leads him to run his craft aground on a rock. Yves leaves the wrecked submarine and chases after the departing naiads, but is attacked by huge fish and crabs. He escapes and travels past further underwater marvels, including underwater caves, anemones, corals, giant seahorses, and an octopus that attacks him. However, in vengeance for all the fish Yves has caught in his career, goddesses of the sea trap the fisherman in a net and let him fall into a gigantic hollow sponge, from which he struggles to escape.