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Vaquitas are critically endangered porpoises found only in the northern Gulf of California in Mexico, and their survival depends on stopping deaths in fishing nets. The latest survey report estimated that researchers saw 7–10 different vaquitas in its study area in 2025, but it warns that visual estimates are too uncertain to establish a population trend. Those observations are not a count of every vaquita alive. Here are 10 essential facts about what vaquitas are, where they live, why they are in danger, and what recovery would require.
1. A vaquita is a porpoise, not a dolphin
The vaquita (Phocoena sinus) belongs to the porpoise family. Porpoises and dolphins are both cetaceans, but they are different groups. A vaquita has a rounded head without the projecting beak commonly associated with dolphins, plus dark patches around its eyes and lips. Its body is small and sturdy, with a triangular dorsal fin. NOAA Fisheries describes the adult vaquita as about five feet long.
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2. Vaquitas live in only one small part of the world
Vaquitas are endemic to the northern Gulf of California, also known as the Sea of Cortez, in Mexico. Their range is associated with the area around San Felipe and the Colorado River Delta Biosphere Reserve. They do not live throughout the Gulf of California, in the open Pacific, or in other oceans.
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This restricted range makes the species especially vulnerable: a threat in its limited habitat can affect the entire species. For details on the documented range and species biology, see NOAA Fisheries’ vaquita profile.
3. They are small, shy, and easy to miss
Vaquitas are usually alone or in pairs and tend to make slow, inconspicuous rolls at the surface. They are known to avoid boats with active engines. Their small size, subtle surfacing, and small group sizes make them difficult to observe and count, even in the area where they live.
That matters when interpreting sightings: not seeing an animal during a survey does not, by itself, establish that it is absent. Researchers use visual observations alongside acoustic monitoring to gather evidence, but neither should be mistaken for a simple headcount of the whole population.
4. The 2025 survey reported sightings—not a definitive population census
The newest survey located in the available evidence is the 2025 acoustic and visual survey. Its report gives a 67% probability that 7–10 different vaquitas were seen in the study area that year. It gives comparable estimates of 6–8 different animals in 2024, with a 75% probability, and 8–12 in 2023, with a 67% probability.
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These figures describe the estimated number of different individuals seen in the survey area—not the total number of vaquitas alive worldwide. The report explicitly cautions that “there is too much uncertainty in visual estimates to make strong conclusions about trends.” The ranges overlap, and they should not be read as proof that the population increased or decreased from one year to the next.
In 2025, survey teams recorded 8,457 days of acoustic monitoring and conducted two ship-months of visual survey effort. The report also detected significant vaquita use northwest of the Zero Tolerance Area, within the Vaquita Refuge, and recommends protection and enforcement in that area. Read the 2025 survey report for the methods, findings, and limitations.
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NOAA’s species page uses the phrase “as few as ten animals,” but it does not present that statement as a new survey result. It should not replace the more carefully qualified 2025 survey findings or be presented as a precise current census.
5. Their long-term decline has been devastating
The International Whaling Commission (IWC) reports an estimated cumulative decline of 99% from 1998 to 2018. Its historical table lists the following abundance estimates:
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| Year | Historical estimated abundance |
|---|---|
| 1997 | 567 |
| 2008 | 245 |
| 2015 | 59 |
| 2016 | 30 |
| 2018 | 9 |
These are historical estimates, not current counts. The IWC identifies 2018 as the date of its vaquita assessment, and says its Scientific Committee has reviewed published assessments—including modelling by outside agencies—rather than conducting its own status-assessment modelling for vaquitas. The figures show the scale of the collapse, but they cannot be combined with the 2025 number of different animals seen as if both measured the same thing. See the IWC’s vaquita status summary for its dated estimates and explanation.
6. Gillnets are the main known cause of vaquita deaths
Vaquitas become entangled in gillnets and drown. NOAA identifies fishing-gear entanglement—especially gillnets—as the only known threat to the species and says vaquitas die in every type of gillnet. Nets set for shrimp and finfish can kill them, as can nets used in illegal fishing for totoaba.
Because vaquitas are air-breathing mammals, being trapped underwater can prevent them from reaching the surface. The conservation priority is therefore not simply to reduce one particular kind of net: it is to stop gillnet mortality throughout the vaquita’s occupied range. NOAA’s conservation-management overview describes the relevant priorities and management context.
7. Illegal totoaba fishing brought another pressure into their habitat
Illegal fishing for totoaba increased around 2011, driven by demand for the fish’s swim bladder. Vaquitas are not the target of that fishery, but they can be caught in the gillnets used to catch totoaba. This is one reason the vaquita’s fate is tied to enforcement of fishing restrictions as well as to whether alternative fishing methods can work for local fishers.
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Illegal totoaba fishing is not the only source of risk: vaquitas are also vulnerable to gillnets set for other fish and shrimp. Focusing narrowly on one target species would miss the wider problem. Protection has to prevent entanglement across the different fisheries that use gillnets in vaquita habitat.
8. Vaquitas eat small marine animals and live in a productive coastal ecosystem
Their diet includes small fish, crustaceans such as shrimp, and cephalopods such as squid and octopuses. This varied diet reflects their role as predators in the northern Gulf’s marine food web; it does not make them dependent on a single prey species according to the available NOAA profile.
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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Vaquitas are adapted to their coastal habitat, but the existence of suitable prey or apparently healthy individuals does not remove the immediate danger from fishing gear. Conservation discussions sometimes raise changes in Colorado River flow and habitat conditions. A January 2025 commentary by the IUCN SSC Cetacean Specialist Group argues that habitat alteration has not sealed the species’ fate: its authors point to healthy condition in examined carcasses and observed animals, and say changes in the rate of decline align with changes in gillnet fisheries. That is the authors’ position in a scientific debate, not a claim that habitat science has no uncertainty. The practical management priority remains stopping gillnet deaths. Read the IUCN SSC commentary on habitat alteration for its argument and supporting discussion.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.9. Vaquitas reproduce slowly, but calves have been observed
NOAA reports that vaquitas reach sexual maturity at about three to six years. Pregnancy lasts roughly 10–11 months, and females are thought to give birth to a single calf about every other year, usually between February and April. A slow reproductive pace makes it harder for a small population to replace animals lost to entanglement.
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The 2025 survey report documents a yearling and one to two juveniles born since March 2022. Its authors interpret these sightings as evidence that calves are being born and surviving. They do not establish that the population is recovering: the same report says visual-estimate uncertainty is too great for strong conclusions about overall trends. Calves are a meaningful sign of continued reproduction, but they do not change the need to stop deaths in nets.
10. Recovery is possible only if gillnet deaths stop
The 2025 survey report says recovery potential depends critically on the complete cessation of gillnet mortality. It calls for protected sanctuary areas, including concrete blocks with hooks intended to deter gillnet fishing, and a transition to alternative fishing gear and practices across the vaquita’s historical range. The survey’s evidence of vaquita use northwest of the Zero Tolerance Area also underlines why protection and enforcement need to cover more than one designated zone.
NOAA likewise lists permanently banning gillnets throughout the vaquita’s range, stopping illegal fishing, and using passive acoustic monitoring to evaluate conservation actions as priorities. These measures address different parts of the problem: rules and enforcement prevent risky fishing, workable alternative gear can support a shift away from gillnets, and monitoring helps assess whether animals continue to use protected areas.
How can I help save the vaquita?
Readers can learn about the conservation work and support options described by organizations such as the Porpoise Conservation Society. Its vaquita adoption is symbolic; it does not mean that a person owns, receives, or directly cares for an animal. Readers can also share accurate, carefully qualified information: describing survey sightings as sightings, rather than as a definitive count of all animals alive, helps keep attention on the evidence and on the need to prevent gillnet deaths.
Frequently Asked Questions
How much does a vaquita weigh?
NOAA Fisheries gives a weight range of about 65–120 pounds. Individual size can vary; the figure is a species quick-fact range, not a weight estimate for the animals observed in the latest survey.
How long can a vaquita live?
NOAA’s quick facts give a lifespan of about 20 years, while its life-history information says individuals can live at least 21 years. Those rounded figures should not be treated as a precise maximum lifespan.
When are vaquita calves usually born?
NOAA says births are thought to occur usually from February through April. The 2025 survey report’s observations of a yearling and juveniles show that young animals have been present, but do not establish a population trend.
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