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Sei whale

Sei whale lifespan and age in human years

Longest recorded 74 years

🏆 The longest-lived sei whale on record reached 74 years in the wild.

Sei whale (Balaenoptera borealis). The oldest known individual lived 74 years; this chart maps that record to a human age of 120. Most individuals live considerably shorter lives than the record.

How old in human years?

Age

Sei whale age chart in human years

Shaded rows are equivalent to human age 60+.

Sei whaleHuman ageStage
5 yr9Child
10 yr18Teen
15 yr26Adult
20 yr34Adult
25 yr42Middle age
30 yr50Middle age
35 yr58Middle age
40 yr66Senior
45 yr74Senior
50 yr82Elderly
55 yr90Elderly
60 yr98Elderly
65 yr106Elderly
70 yr114Elderly
75 yr122Elderly
80 yr130Elderly
85 yr138Elderly
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Sei whale profile

ClassificationMammalia > Cetacea > Balaenopteridae
Scientific nameBalaenoptera borealis
Adult weightabout 2e+04 kg
Age of maturity10 years
Gestationabout 345 days
Litter / clutch size1
Longest recorded74 years (wild)

Sources

How we convert ages: method.

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