B. ricei
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Immature form that undergoes metamorphosis before adulthood.
Worker
Elders
sea almost always under thick ice, very cold
Bro
Very cold
birth time
Pelagic Ocean
Taxons
Temperate sea
if born as {name}
water cool or warm, cold in winter, swimmable in summer
Dogs, dolphins, lynx hang out for 9-25 years and party on their birthday three times a year
m
Map
will celebrate their {n} birthday
g
age
t
When your next jubilee falls in {name} life years
water is almost always warm, even in winter you can swim, very hot in summer
Human
birth date
hot Africa south of the desert, many savannas and forests
Palearctic realm
Close
was
days
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Marine world
The basics
How old you would be if you lived as {name}
Theoretical maximum lifespan estimated from the Dynamic Energy Budget (DEB) mathematical model. This value reflects a biological potential derived from metabolic parameters, not from direct observation — real recorded lifespans are often significantly shorter.
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
adult
Maturity
Temperate sea
Potential Habitat
About health
marine coastal
When your next birthday would fall if you lived as {name}
d
In husbandry
On the go from 1.3 to 3.5 years. Forest mice, anoles, rainbow fish party on their birthday once a month
Sofa
Repro interval
results
Polar sea
Mass
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
Southeast Asia and islands, always hot and humid
Gestation
water is cool or warm, cold in winter, you can swim in summer
Sex
Warm sea
{name} birthday
Upcoming jubilees
Gremllins
mo
Always hot
No results found
all seas and oceans
polar
Filters
On the map
Female ♀
the coldest and iciest edge, almost always snow and ice
Upcoming birthdays
world of Afrotropics
150 to 300 kilograms, 1.6 – 4 meters
Polar sea
Map data sources: Ecosystem classification — IUCN Global Ecosystem Typology (Keith et al., 2022), indicative distribution maps Keith et al. (2020), https://doi.org/10.5281/zenodo.3546513; Large Marine Ecosystems — NOAA LME Program; Bathymetry — GEBCO Bathymetric Compilation Group (2026), GEBCO_2026 Grid, https://doi.org/10.5285/4f68d5c7-45eb-f999-e063-7086abc036fa; Climate data — Generated using Copernicus Climate Change Service information; Species occurrence data — GBIF.org, Derived dataset "all animals", https://zveriki.com/dataset/dataset.tsv; Terrestrial ecoregions — RESOLVE Ecoregions 2017 (Dinerstein et al., 2017), CC BY 4.0
Potential habitat modelled from GBIF occurrence data. Map © Zveriki.com, licensed under CC BY 4.0.
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
birth year
Age (juvenile)
Age (from birth to death)
sq mm
yr
Age (embryo)
most of Europe and Asia, various forests, steppes and tundra
Wanderers
How similar?
far from shore, deep water, large whales and sharks live here
water is almost always cold, there may be ice in winter, not hot in summer
Jubilee = every 10th birthday
Male ♂
until the celebration
age as {name}
How do they breed?
On the go from 3.5 to 6 years. Hedgehogs, crows, lizards treat themselves to birthday snacks 6 times a year
What if eaten?
Neither
Earliest developmental stage inside an egg or womb.
Business sausages
world of Antarctica
Lifespan average
Temperate Sea
What do they eat?
water is almost always cold, there may be ice in winter, not hot in summer
Cold Sea
Where do they live?
Marine world
early young
What do they look like?
Maturity
emergence (insects)
world of Afrotropics
end of lifespan
How do they live?
fertilization / egg laying
How do they behave?
birth / hatching
metamorphosis / end of larval stage
end of acceleration
Share
Find a pet...
Mature, fully developed individual capable of reproduction.
Cold sea
very cold, lots of snow and ice
saline marine habitat
This is me
water is cool or warm, cold in winter, comfortable to swim in summer
Gamers
world of Antarctica
Pets
How are they built?
Indomalayan realm
marine
shallow near the shore, water rises and falls, crabs live here
mm
Theoretical lifespan
Indomalayan realm
ml
Stars
Link copied
the coldest and iciest edge, almost always snow and ice
coastal marine zone — shelf, neritic zone
My age?
wk
My size?
sea almost always under thick ice, very cold
sea almost always covered with thick ice, very cold all year round
{name} jubilee
Asexual
water almost always cold, ice possible in winter, summers not hot
swap
cm
Subpolar sea
Old-timers
Find an animal or breed...
Southeast Asia and islands, always hot and humid
turns
Rabbits, falcons, red-eared turtles hang out for 6-9 years and party on their birthday four times a year
Rascals
Where do they take shelter?
celebrated their {n} birthday
hot Africa south of the desert, many savannas and forests
When you would have been born if you lived as {name}
very hot all year round, frequent rains, but sometimes dry
Littoral Zone
Daddies
Lifespan maximum
Map data sources: Ecosystem classification — IUCN Global Ecosystem Typology (Keith et al., 2022), indicative distribution maps Keith et al. (2020), https://doi.org/10.5281/zenodo.3546513; Large Marine Ecosystems — NOAA LME Program; Bathymetry — GEBCO Bathymetric Compilation Group (2026), GEBCO_2026 Grid, https://doi.org/10.5285/4f68d5c7-45eb-f999-e063-7086abc036fa; Climate data — Generated using Copernicus Climate Change Service information; Species occurrence data — GBIF.org, Derived dataset "all animals", https://zveriki.com/dataset/dataset.tsv; Terrestrial ecoregions — RESOLVE Ecoregions 2017 (Dinerstein et al., 2017), CC BY 4.0
How to care for them?
Living from 25 to 40 years. Orangutans, bald eagles, African elephants celebrate their birthday twice a year
°C
Not specified
Polar Sea
the sea is covered with ice most of the year or has many ice floes, very cold in winter
Hermaphrodite ⚥
Where are they found?
all seas and oceans
Cold sea
embryo
Length
kg
Observations
◉{N} more on tap