Kino goes to work diving in the Gulf for oysters from his canoe; Juana tends to Coyotito in the canoe by applying brown seaweed to his shoulder, which is swollen from the scorpion's bite. As Kino is collecting oysters on the ocean bottom, he spots a larger-than-usual oyster, collects it, and returns to the canoe. Kino does not want to open the oyster immediately, but Juana prompts him to open the oyster; when he does, he finds a pearl the size of a sea gull's egg. Juana gazes at the immense pearl; she then goes to check on Coyotito and discovers that Coyotito's shoulder is no longer swollen. Kino is immensely happy about both the pearl and Coyotito and yells loudly enough that he attracts the attention of the other oyster divers, who race toward his canoe.
Before Kino reaches home with his great pearl, the news of his discovery has already reached his village and the town. Everyone fantasizes what he or she would do with the wealth that the pearl represents, including the doctor, who previously refused to help Coyotito but now says that the baby is a patient of his. The priest arrives at Kino and Juana's hut and tells Kino that he needs to give