Scientists Filmed a Sperm Whale Give Birth. A Dozen Whales Showed Up to Help.

What Researchers Saw

In 2023, researchers studying whale communication off the Caribbean island of Dominica noticed something unusual: 11 sperm whales, most of them female, surfaced with their heads facing one another and held strangely still before beginning to thrash and dive. Blood reddened the water. The scientists, fearing a shark attack, deployed drones and microphones.

What they had stumbled into was a birth — one of the rarest events ever captured on film in the wild. After about 30 minutes, a 12th, much smaller whale appeared: a newborn calf, lifted to the surface by the group so it could breathe, according to the Associated Press.

"The group quite literally helps bring the calf into the world," said Oregon State University behavioral ecologist Mauricio Cantor, who was not involved in the research, in a statement to the AP.

The Research: Two Studies, One Event

The footage and audio were analyzed in two peer-reviewed studies published Thursday, March 26, 2026 — one in the journal Science and one in Scientific Reports — by researchers with Project CETI (Cetacean Translation Initiative), a nonprofit organization focused on whale communication research.

The studies document the sequence of events: the pre-birth clustering, the delivery itself (approximately 30 minutes), and a prolonged post-birth phase lasting hours in which pairs of whales took turns holding the newborn above water until it could swim independently, according to both the AP and the New York Times.

Researchers also created software to analyze the sounds recorded during the birth. The whales produced distinct vocalizations during key moments — slower, longer sets of clicks that the scientists believe may have aided coordination among the group, per the AP.

The Surprise: Non-Relatives Participated

What most struck the researchers was the composition of the group. Half of the whales attending the birth were not related to the mother, according to the New York Times. The whales present came from two separate family lines.

"I don't think it's midwives or doulas in our human perspective, but there was definitely assistance and support for both the mother and the calf," said Alaa Maalouf, one of the study authors and a specialist in machine learning and robotics with Project CETI, in the New York Times.

The participation of non-kin is scientifically significant. When only relatives help during birth, scientists can attribute the behavior to kin selection — the evolutionary drive to protect shared genes. When non-relatives participate, it suggests something more complex: social reciprocity, group-level cooperation, or cultural behavior that transcends genetic lines.

Study co-author Shane Gero, also with Project CETI, described the observation as remarkable. "It's amazing to think about how, when faced with this impossible challenge, these animals come together to succeed," he told the AP.

Why This Is Rare

There are only a handful of sperm whale birth records from the past 60 years, and all are anecdotal accounts or observations from whaling vessels, according to the AP. Wild births are almost never documented because sperm whales spend the vast majority of their lives underwater, making sustained observation extremely difficult.

Births in captivity have been recorded before, but captivity fundamentally alters animal behavior. Many social animals, including lions and chimpanzees, actively seek isolation to give birth — a behavior scientists believe is driven at least in part by the threat of male aggression toward newborns, according to the New York Times. Studying birth under natural social conditions, at scale, is rare in almost any species.

Susan Parks, a biologist at Syracuse University who was not involved in the new studies, called the findings exciting. "I think it's just exciting to think about the social lives of these animals," she told the AP.

What It Tells Us About Sperm Whale Society

Sperm whales are known to live in close-knit, female-led social groups. Adult males largely live alone or in small bachelor groups, while females and calves form multi-generational family units. The new research shows that these social structures extend meaningfully into the most vulnerable moments of a whale's life — and that cooperation can cross family lines.

The findings add sperm whales to a short list of non-human species in which something resembling assisted birth has been observed. That list includes some primate species, elephants, and dolphins — but evidence for sperm whales has until now been absent from the scientific record.

Unanswered questions remain. The researchers note they do not yet know how the group assembled before the birth, how the non-related whales "knew" to participate, or whether this type of cooperative birth assistance is common or exceptional within the species. Given the scarcity of documentation, answering those questions will likely require years of additional fieldwork.

Study co-author David Gruber of Project CETI put it simply: "This was just really a special event."