AnimalvsAnimal
Inia🐋

Photo: Dennis Otten · CC BY-SA 3.0

SpeciesCetaceaIniidae
Marine mammals

🐋Amazon river dolphin

Inia geoffrensis (Blainville, 1817)

Le boto, également appelé boutou, butu, dauphin rose de l'Amazone ou encore Inie de Geoffroy (Inia geoffrensis), est une espèce de mammifère de l'ordre des odontocètes. C'est un dauphin vivant exclusivement en rivière, donc un dauphin d'eau douce. C'est la seule espèce du genre Inia jusqu'à la découverte de l'espèce Inia araguaiaensis publiée en janvier 2014. Il ne faut pas le confondre avec le Tucuxi (Sotalie de l'Amazone), une espèce marine qui s'aventure aussi en eau douce. Au Miocène, l'Amazonie a été couverte d'eau de mer par intermittence. Les dauphins d'eau douce descendent d'ancêtres ayant peuplé l'Océan au Miocène et qui ont pénétré en Amazonie. Ils ont ensuite évolué pour s'adapter à l'eau douce lorsque la mer s'est retirée. Les dauphins de rivière semblent rose-orange dans le bassin amazonien, où la vase et la végétation décomposée donnent une couleur de thé au milieu aquatique. Une fois hors de l'eau, les dauphins apparaissent gris pâle, certains avec des marques roses.

Text: Wikipedia, CC BY-SA 4.0.

Videos
None yet
Photos
2
Measurements
11
vs you
≈ 1.6× your weight
Also called
Boto, Bouto, Bolivian River Dolphin, Boutu, Orinoco River Dolphin, Pink River Dolphin
Conservation status
ENEndangered

IUCN Red List assessment, 2018.

Population trendDecreasing
Key measurements
Body mass
99 kg
Body length
2.56 m
Shoulder height
not recorded
Top speed
not recorded
Bite force
not recorded
Maximum lifespan
31 years
All measurements ↓
Facts and figures

Everything we know about the Amazon river dolphin

Typical adult figures. Where a value is an estimate rather than a measurement, it says so.

Body mass
99 kgrecord 160 kg · SeaLifeBase
COMBINE
Other figures ↓

Record: largest individual on record

Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0

Figures vary

  • 84 kgAnAgeAnAge build 15, 2023-07-03 (HAGR)data quality: acceptable
Body length
2.56 m
COMBINE
Other figures ↓

Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0

By sex

  • Female2.3 mSeaLifeBasev25.04

Figures vary

  • 2.8 mSeaLifeBasev25.04
Brain mass
610 g
COMBINE
Details ↓

Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0

Maximum lifespan
31 years
COMBINE
Other figures ↓

Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0

Figures vary

  • 31 yearsAnAgeAnAge build 15, 2023-07-03 (HAGR)data quality: acceptable
Generation length
13 yearsestimated
COMBINE
Details ↓

Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0

Age at maturity
3.5 years
COMBINE
Details ↓

Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0

Gestation
299 days
COMBINE
Other figures ↓

Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0

Figures vary

  • 287 daysAnAgeAnAge build 15, 2023-07-03 (HAGR)data quality: acceptable
Litter size
1
COMBINE
Other figures ↓

Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0

Figures vary

  • 1AnAgeAnAge build 15, 2023-07-03 (HAGR)data quality: acceptable
Trophic level
Carnivore
COMBINE
Details ↓

Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0

Activity cycle
Diurnal
COMBINE
Details ↓

Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0

Volume l
99 Laverage
Details ↓

Body mass at ~1.0 kg/L, the density of vertebrate tissue.

estimated = a model's estimate for a species nobody has measured; average = a mean across sexes or species in a group.

Not recorded for Amazon river dolphin yet: shoulder height, top speed, bite force.

Where it sits

Family tree

  1. kingdomAnimalia
  2. ›phylumChordata
  3. ›classMammalia
  4. ›orderCetacea
  5. ›familyIniidae
  6. ›genusInia
  7. ›speciesInia geoffrensis
Full lineage
  1. classMammals · Mammalia
  2. orderEven-toed hoofed animals · Artiodactyla
  3. infraorderWhales & dolphins · Cetacea
  4. genusInia
All 15 branches ↓
  1. kingdomMetazoa
  2. phylumChordata
  3. subphylumCraniata
  4. subphylumVertebrata
  5. superclassGnathostomata
  6. superclassSarcopterygii
  7. superclassTetrapoda
  8. classMammals · Mammalia
  9. subclassTheria
  10. superorderLaurasiatheria
  11. orderEven-toed hoofed animals · Artiodactyla
  12. suborderWhippomorpha
  13. infraorderWhales & dolphins · Cetacea
  14. familyIniidae
  15. genusInia
More

More about the Amazon river dolphin

Closest relative on this site
🐋 Baiji — last shared an ancestor ≈ 11 million years ago.
What it eats
fish90%
insects and other invertebrates10%
In other languages
Amazonasdelfin (de), Inia geoffrensis. (es), boto (fr), Inia amazońska (pl), דולפין האמזונאס (he), 보토 (ko) … and 25 more languages
More photos
IniaBoto cor de rosa rio negro Manaus Amazonas Brasil
All 2 photos in the gallery →
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Tree of life

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