Humpback whale

• 1. Introduction

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  The humpback whale, known scientifically as Megaptera novaeangliae, holds a name that translates from the Ancient Greek as "giant wing" - a nod to the enormous pectoral fins that can stretch to one-third of the animal's entire body length. Picture a creature up to 17 meters long, weighing as much as 40 metric tons, capable of launching its full bulk out of the ocean in a maneuver called breaching. Then picture it singing - producing songs that can last up to 33 minutes and travel at least 10 kilometers through open water.

  By the 1960s, fewer than 5,000 humpbacks remained on earth. Humans had hunted them nearly out of existence. Today, around 135,000 swim the world's oceans. That recovery is a rare good-news story in the history of wildlife. But what makes the humpback worth studying is not just its survival. It is the extraordinary complexity of the life it leads: the bubble-net hunting strategies passed between generations, the songs that appear to follow patterns found in human language, the long-distance migrations that take individuals across thousands of kilometers of open ocean. This documentary follows the humpback into those depths.

• 2. A Name Built from Wandering

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  Mathurin Jacques Brisson gave the humpback its first formal scientific label in 1756, calling it baleine de la Nouvelle Angleterre - the whale of New England - in his work Regnum Animale. He likely chose the name because of how frequently humpbacks appeared off the northeastern coast of North America. Georg Heinrich Borowski converted that description into Latin in 1781, producing Balaena novaeangliae. The name "humpback" itself came later, and more plainly: it refers to the distinctive curve of the whale's spine as it dives, an arch that is visible from a considerable distance at sea.

  The genus name Megaptera was established by John Edward Gray in 1846. Remington Kellogg restored Borowski's species name in 1932, anchoring the animal in its current scientific form. The humpback is the sole member of its genus, sitting within the broader family Balaenopteridae - the rorquals - alongside blue, fin, Bryde's, sei, and minke whales. A 2018 genomic analysis traced the divergence of rorquals from other baleen whales to the late Miocene, between 10.5 and 7.5 million years ago. Within that family, the humpback and the fin whale are sister taxa.

  Modern humpback populations first arose in the southern hemisphere around 880,000 years ago, then spread into northern waters between 200,000 and 50,000 years ago. A 2014 genetic study found that the North Atlantic, North Pacific, and Southern Ocean populations have diverged enough to be considered separate subspecies: M. n. novaeangliae, M. n. kuzira, and M. n. australis. A non-migratory group in the Arabian Sea has been isolated for 70,000 years and may represent yet another distinct subspecies.

• 3. Body and Senses

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  Female humpbacks are typically 1 to 1.5 meters longer than males, a reversal of the pattern seen in many large mammals. The longest reliably recorded female measured 18.6 meters; the longest male, 17.4 meters. Calves enter the water at roughly 4.3 meters long and a mass of 680 kilograms. The upper jaw is lined with 540 to 800 black baleen plates, through which the animal filters enormous volumes of prey-laden water.

  The tubercles that stud the humpback's head and flippers are unique among large whales. Each bump is 5 to 10 centimeters thick at the base and protrudes up to 6.5 centimeters. Most are hollow at the center and contain at least one hair, just 0.1 millimeters thick, that extends 1 to 3 centimeters from the skin. The tubercles develop during gestation and are densely packed with nerves, suggesting a sensory role. Computer models of the humpback's middle ear indicate it can detect frequencies between 15 Hz and 3 kHz when the tympanic membrane is stimulated directly, and between 200 Hz and 9 kHz when vibration reaches a thinner adjacent region of bone. These hearing ranges align with the frequencies the animals use to communicate.

  In one study, a humpback brain weighed around 4.6 kilograms and measured 22.4 centimeters long. Researchers found spindle cells in that brain - the same cells that, in humans, are linked to theory of mind. The humpback's vocal anatomy is equally specialized: its vocal folds are positioned more horizontally than those of land mammals, producing underwater calls that are amplified by a laryngeal sac. The animal can also apparently unlock its epiglottis and larynx and draw them toward the oral cavity, allowing it to blow bubbles from its mouth - a capability with significant consequences for how it hunts.

• 4. The Bubble-Net Hunters

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  Krill concentrate in extraordinary densities in certain Antarctic waters. A 2009 study in Wilhelmina Bay, on the western side of the Antarctic Peninsula, recorded humpback whale densities of 5.1 animals per square kilometer, gathered over a super-aggregation of Antarctic krill. The whales were preparing for winter, eating as much as they could before the feeding season ended. In the southern hemisphere, foraging gatherings can reach 200 individuals.

  Bubble-net feeding is the humpback's signature hunting strategy, and researchers classify it as tool use. A group of whales swims in a tightening circle below a school of prey, releasing air from their blowholes to create a rising cylinder of bubbles. The bubbles confuse and compress the prey; the whales then swim upward through the column with their mouths open. The technique comes in two main variations: upward spirals, in which whales blow continuously as they rise, and double loops, in which a deep initial arc herds the prey before a surface slap and a second, smaller loop precedes the final lunge. Whales may dive up to 20 meters during this process.

  At Stellwagen Bank off Massachusetts, humpbacks have been recorded using an entirely different tactic: pressing their jaws against the seafloor to flush out sand lances hiding in the sediment. One study using network-based diffusion analysis tracked how whales learned a lobtailing behavior from groupmates over 27 years, in response to a shift in their primary prey. The tubercles on the pectoral fins play a mechanical role in all this maneuvering: they alter the angle of attack on the flipper surface, maximizing lift and minimizing drag, making the sharp turns of bubble-net feeding physically possible. Fish prey include herring, capelin, sand lances, and Atlantic mackerel.

• 5. Songs and Other Voices

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  Male humpbacks sing only during the winter breeding season, and those songs carry a structural complexity that surprised researchers when it was first analyzed. Each song is built from subunits - the basic discontinuities or inflections of a sound - that combine into units, the individual sounds comparable to musical notes. Units build into subphrases; subphrases into phrases; phrases into themes; themes into the full song. Vocals range from 100 Hz to 4 kHz, with harmonics reaching 24 kHz or more. In Hawaii, some males have been recorded singing for as long as seven hours. Humpback whale songs appear to follow Zipf's law - the same statistical pattern found in human languages.

  The songs spread. Males in a given region share similar songs, and those songs shift over time as individuals incorporate changes they hear from neighbors. In the northern hemisphere, these changes are gradual. Southern hemisphere populations go through more dramatic cyclical revolutions. Songs have been documented spreading between neighboring populations across successive breeding seasons. A 2023 study found that as humpback numbers have recovered from the whaling era, singing has become less common - a pattern that remains to be fully explained.

  Beyond song, humpbacks produce a range of shorter vocalizations tied to specific social contexts. Low-frequency "snorts" are heard most often in groups containing a mother-calf pair with one or more male escorts. "Grumbles" last longer and tend to come from groups with adult males; researchers believe they signal body size and help establish social rank. "Thwops", "wops", and high-pitched "cries", "violins", and modulated "shrieks" are associated with competition between males. Humpbacks also produce short "grunts" and "barks" when joining new groups. Whether females are drawn to individual singers or to larger gatherings of singing males - operating more like a lek mating system - remains an open question.

• 6. Breeding on the Edge

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  Mating occurs during winter, when females enter estrus and males reach peak testosterone and sperm levels. Both sexes take multiple partners. Males form competitive hierarchies around receptive females: the "principal escort" is the male closest to the female, and he fights off rivals called "challengers" using tail slashing, ramming, and head-butting. "Secondary escorts" trail farther back, outside the direct conflict.

  Video footage taken near Hawaii recorded three male humpbacks producing bubbles directly under a female's genitalia twelve separate times. The female did not flee; she responded by rolling toward the bubble releases, arching, or slightly lifting her tail. This behavior, also documented near the Cook Islands, represents a form of stimulation that researchers have described as potentially pleasurable - a novel concept among cetaceans. Before birth, a pregnant female moves into shallower coastal water, reducing the risk of harassment by escort males.

  Gestation lasts 11.5 months. Fetuses develop teeth early but replace them with baleen during the final months before birth. One recorded birth off Madagascar was completed within four minutes. Calves are born with furled dorsal fins that straighten over time; calves with straighter fins can hold their breath longer and spend more time resting at the surface. Young humpbacks nurse for up to a year but begin eating adult food at six months. Sexual maturity arrives anywhere between 5 and 15 years of age, depending on the population. Physical maturity follows at 8 to 12 years. The species can live for over 50 years; the oldest recorded individual was 95 years old.

• 7. Predators and Parasites

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  Orcas are the primary natural predator of humpback whales. A 2014 study in Western Australia found that when young humpbacks are present in large numbers, orcas will attack and sometimes kill them. Adult humpbacks actively defend calves, and there is evidence they will also mob orcas attacking members of entirely different species - a behavior researchers believe may be a spillover of defensive instincts directed at protecting their own kind. The humpback's pectoral fins, often encrusted with large, sharp Coronula barnacles, serve as weapons in these encounters.

  Great white sharks are a confirmed predator as well. In 2020, marine biologists Dines and Gennari and colleagues published a documented case of two great white sharks attacking and killing a weakened 7-meter humpback. A second incident, off the coast of South Africa, involved a single shark targeting a 10-meter emaciated and entangled animal: the shark crippled the whale by attacking its tail, then drowned it by biting onto its head and pulling it underwater. In 2006, a group of tiger sharks near Hawaii killed an ailing humpback.

  The barnacle species Coronula diadema and Coronula reginae are the most common passengers on a humpback's skin, concentrated at the lower jaw, along the central ventral groove, near the genital slit, and between the bumps on the flippers. These barnacles in turn provide attachment sites for goose barnacles including Conchoderma auritum and Conchoderma virgatum. The whale louse Cyamus boopis feeds exclusively on humpbacks and is the only member of its family found on this species. Internal parasites include protozoans of the genus Entamoeba, tapeworms of the family Diphyllobothriidae, and roundworms of the infraorder Ascaridomorpha. Saxitoxin, a paralytic shellfish poison carried in contaminated mackerel, has been linked to humpback deaths.

• 8. From Near-Extinction to Partial Recovery

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  Humpbacks were being hunted as early as the late 16th century. Because they tend to stay close to coastlines, they were often the first whale species taken in any given region. North Pacific kills alone are estimated at 28,000 during the 20th century. More than 200,000 were taken in the Southern Hemisphere during the same period. North Atlantic populations fell to as few as 700 individuals.

  The International Whaling Commission was founded in 1946 to regulate the industry. Its ban on commercial humpback whaling came in 1966, by which point the global population had already been ground down to around 5,000. The scale of the loss was larger than official figures suggested. The Soviet Union reported catching 2,820 humpbacks between 1947 and 1972; the actual total was over 48,000. Japan announced plans to kill 50 humpbacks in the 2007-08 season under the JARPA II research program. International protests and a direct visit to Tokyo by the IWC chair persuaded the Japanese fleet to suspend humpback hunting for two years while negotiations continued.

  As of 2018, the IUCN Red List classifies the humpback as a species of least concern, with around 135,000 individuals worldwide, of which roughly 84,000 are mature. Regional estimates put about 13,000 in the North Atlantic, 21,000 in the North Pacific, and 80,000 in the southern hemisphere. The exception is the Arabian Sea population, where only around 80 individuals remain and the group is considered endangered. NOAA recorded 88 stranded humpbacks along the Atlantic coast of the United States between January 2016 and February 2019 - more than double the number stranded in the preceding three years. NOAA declared an unusual mortality event in April 2017, with vessel interactions and entanglement identified as the two main causes. Around the Strait of Magellan, humpbacks have been the whale species most commonly involved in ship collisions since at least 2013, prompting proposals for speed limits near the Francisco Coloane Marine and Coastal Protected Area.