The Pacific Ocean, the opening and migration setting, is more than a setting for the novel’s ecological crisis: it is a space that sustains livelihoods, carries animals across vast distances, and repeatedly defeats human efforts to observe or understand it. Its coastal waters bring industrial pressure and local loss into view, while its depths conceal processes that may have consequences far beyond any one shore. The contrast between what is visible and what remains out of reach gives the ocean a central narrative force.

Coastlines, livelihoods, and an overlooked disappearance

On 14 January, at Huanchaco on the Peruvian coast, Juan Narciso Ucañan disappears without anyone noticing. Only later do the circumstances surrounding his fate send shockwaves around the world, and even then his name is omitted. The opening makes his disappearance an emblem of how an individual life can vanish inside a much larger crisis: the connections between incidents become apparent only after events have advanced, while the person who might have explained what happened is no longer available to do so.

Ucañan’s precarious life is tied to a declining fishery. Twenty-eight years old and among the last of his kind, he persists with a small caballito de totora while his five elder brothers work in Lima. His father, who had fished until a few weeks earlier, is bedridden and unwell; Ucañan hopes that continuing the family tradition might keep him alive. The hope binds work, family, and survival together, even as the waters grow emptier.

The causes of that decline are not his making. El Niño has long afflicted Peru, while floating factories and Japanese and Korean trawlers wait near the 200-mile boundary to take fish. Environmental debate and political pressure settle on individual fishermen as convenient culprits, though the larger forces shaping the fishery are beyond Ucañan’s control. The novel places this economic and ecological pressure on a person with little power to answer it: he comes to feel responsible for the removal of millions of tonnes of mackerel and tuna even though he did not create the conditions that depleted them. His disappearance follows this slow injury to a livelihood, but the world initially has no attention to spare for it.

Migration routes and the limits of observation

The ocean is also a migratory corridor on a scale that makes human coastal routines seem small. Whales travel roughly sixteen thousand kilometres between warm waters and Arctic feeding grounds, passing through waters off Vancouver Island on the way to the Chukchi Sea. In the colder months they return toward Mexico to give birth. Their passage usually supports busy whale-watching tours in coastal towns; in the year described, however, the expected seasonal traffic does not bring the usual business or reassurance.

Following marine life is difficult even when the animals’ movements can be tracked. Telemetry devices can record such measures as dive length, depth, location, direction, and speed, and ARGOS relays signals through satellites to researchers on land. But the signals can only be received at the surface. A whale that spends most of its time underwater can therefore remain effectively out of sight, and the Pacific’s depth exceeds what divers can reach while submersibles lack the speed and agility needed to follow large marine mammals. Small, pressure-resistant cameras developed by scientists at the University of California in Santa Cruz improve what researchers can learn, yet the amount of material Anawak must evaluate still runs to thousands of hours of recordings, images, readings, and analyses. The ocean produces information faster than people can determine what matters.

That gap between movement and knowledge becomes urgent when the waters off western North America turn dangerous. After attacks along the coast from San Francisco to Alaska, more than a hundred small craft have been sunk or badly damaged, and ordinary boats stay in port. Conflicting media reports and uncertain casualty figures deepen the confusion. Vancouver Aquarium becomes the hub of science-based operations under John Ford, who brings Anawak in because of his expertise in whale behaviour. The investigators consider whether migratory animals are affected while resident populations remain harmless, and whether the cause lies far out in the open ocean. The hypothesis points away from the visible coastline and toward a source hidden in deep water.

The deep ocean as a scientific frontier

The novel distinguishes the shallow continental shelf from the depths beyond it. The shelf is the underwater continuation of the continental plate, generally no more than two hundred metres deep; it is familiar enough to have been heavily used by people. Beyond its edge, the seabed becomes an unknown realm that the narrative compares in its scientific obscurity to outer space. Human settlement remains concentrated near the shore, but the oceanic processes most difficult to investigate may lie far beyond the coastal zone.

A research account places the deep Pacific at the centre of one such problem. In 1996, a grab sampler aboard the RV Sonne retrieved sediment from nearly eight hundred metres down, about a hundred kilometres off the Oregon coast. White lumps in the sediment drew attention because methane hydrate is unstable: under deep-sea conditions, methane combines with cold water to form cage-like structures in which water molecules enclose the gas. The account conveys both the promise and fragility of deep-sea research. Material can change during recovery, and what happens at depth cannot be treated as though it were simply an extension of conditions at the surface.

The novel also emphasizes how hard it is to orient oneself in this environment. In the north Pacific and other polar waters, blue water darkens into an inner space where familiar visual cues fall away. At a thousand metres, a person cannot reliably tell from vision or the inner ear whether a submersible is rising or falling; the depth gauge becomes the dependable guide. The ocean’s remoteness is thus not only a matter of distance. It disrupts ordinary perception and places knowledge in instruments, measurements, and inference.

Ecological connections beyond the shore

The Pacific’s crises belong to a wider pattern of human pressures on the sea. The novel sets fishing depletion alongside industrial pollution, damaged seabeds, and expanding exploitation. It notes that seventy of the two hundred most commonly exploited fish species are endangered, while the number of people making a living from fishing rose from thirteen million in 1970 to thirty million in 1997. Bottom trawling sweeps through ecosystems and deprives marine mammals, seabirds, and other predators of prey. These pressures do not appear as one sudden disaster; they accumulate through practices that can continue even as the life they depend on becomes harder to sustain.

The account of chemical pollution makes that connectedness especially stark. Industrial compounds carried by wind and currents reach the Arctic, accumulate in the fatty tissue of whales, seals, and walruses, and pass through food consumed by Inuit communities. The narrative describes harmful levels of PCBs in Inuit women’s breast milk and neurological impairments among children. Anawak’s reflections join this environmental exposure to a history of displacement: Inuit communities were moved away from traditional lands, hunting grounds, and seasonal routes, while industrial and military priorities reshaped the places where they could live. The sea links distant sources of pollution to people who have little control over its release and bear lasting consequences.

Narrative significance

Across these episodes, the ocean repeatedly frustrates the expectation that a visible event will reveal its cause. Ucañan’s disappearance is unnoticed; whale movements are only partially legible to instruments; deep-sea samples may change on their way to the surface; and pollution travels beyond the places where it originates. The novel’s scale moves from one fisherman’s threatened livelihood to migrations spanning thousands of kilometres and ecological effects carried across waters. That movement makes the Pacific a setting where local experience and planetary processes meet, while its depth preserves the uncertainty that drives the search for an explanation.