The sperm whale is the largest toothed whale in the world. It has a huge head with a special organ inside, dives deeper than any other mammal, and feeds mainly on squids.
The sperm whale differs from other whales by its huge head with a special waxy substance and teeth only on the lower jaw. It is important for the ocean because it eats many squids and transfers nutrients between the depths and the surface.
homogamy, reproduction always with fertilization, no alternation of generations
Worker
sea almost always under thick ice, very cold
birth time
Pelagic Ocean
Heavy rains in summer
humid
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
t
When your next jubilee falls in {name} life years
Human
deep-sea hunting with echolocation
echolocation
very hot and very humid all year round, rain almost every day
very cold, short summer, almost no trees, lots of moss
days
marine pelagic
Warm summer
live octopuses, squids
How old you would be if you lived as {name}
summer from pleasant to very hot
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.
very heavy rains in summer, almost no precipitation in winter
adult
Maturity
cephalopods
About health
Warm or hot summer and rains
milk
cool, lots of coniferous trees, snow in winter
Warm Sea
When your next birthday would fall if you lived as {name}
tropical forest
Truck
Repro interval
results
protection from predators
summer warm, winter not very cold
tropical savanna
Colors
Sex
Upcoming jubilees
Gremllins
mo
Teeth color
warm temperate humid and hot
live fish
rains are very rare, almost a desert
all seas and oceans
Trophic type
Filters
arid steppe cold
Warm or hot summer
Mediterranean forest
always hot and humid, huge trees and vines
Upcoming birthdays
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
high in the mountains, cold, lots of grass and shrubs
Height
Desert and dry shrubs
young are born live on land, not hatched from eggs or roe
rains almost always, very humid
Age (juvenile)
Age (from birth to death)
mediterranean shrubland
Age (embryo)
most of Europe and Asia, various forests, steppes and tundra
Wanderers
far from shore, deep water, large whales and sharks live here
warm temperate
world of Australasia
Jubilee = every 10th birthday
Tundra
Earliest developmental stage inside an egg or womb.
Business sausages
the twilight zone of the sea, 200–1000 meters depth
Warm sea
Lifespan average
Temperate Sea
water is almost always cold, there may be ice in winter, not hot in summer
Cold Sea
Montane grasslands
live birth
live octopuses
What do they look like?
Maturity
emergence (insects)
end of lifespan
hot, there is a dry season, trees shed their leaves
How do they live?
fertilization / egg laying
How do they behave?
birth / hatching
metamorphosis / end of larval stage
fish
end of acceleration
the upper illuminated layer of the sea, 0–200 meters
Share
arid steppe hot
Find a pet...
Mature, fully developed individual capable of reproduction.
Cold sea
hot, uneven rains, lots of grass and trees
very cold, lots of snow and ice
water is cool or warm, cold in winter, comfortable to swim in summer
marine
Actively hunting and capturing live prey.
Pets
snow humid cool
humid forest
deciduous forest
Mangrove thickets
mixed forest
sea almost always under thick ice, very cold
Tropical dry broadleaf forest
Lots of rain and cool summer
{name} jubilee
cm
Temperate coniferous forest
Old-timers
Find an animal or breed...
Skin temp
turns
Rascals
cloud forest
warm swampy sea shores, trees on roots
Flooded grasslands
drink mother's milk in childhood
Abyssal Ocean
Teeth size
Litter size
Tropical savanna
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
temperate forest
How to care for them?
monsoonal
desert
Living from 25 to 40 years. Orangutans, bald eagles, African elephants celebrate their birthday twice a year
more than 0.35 tons, from 2.5 meters
coniferous forest
°C
Not specified
warm temperate humid cool
pelagic zone — open water far from shore and seabed
Where are they found?
all seas and oceans
mountain steppe
Species lacks any fixed or lasting shelter structure.
steppe
desert scrub
lots of rain, cool summer, snow in winter
alpine meadow
Locomotion through water employed while searching for or capturing prey.
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Offspring
Tropical moist forest
Elders
Bro
Very cold
water is almost always warm, even in winter you can swim, very hot in summer
normal sexual
Taxons
Temperate sea
carnivore
if born as {name}
water cool or warm, cold in winter, swimmable in summer
age
water is almost always warm, even in winter you can swim, very hot in summer
birth date
Head size
Palearctic realm
swimming
no permanent shelter
rest
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Marine world
marine epipelagic
The basics
My weight?
octopuses
marine mesopelagic
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
primary food sources
arid steppe
Temperate sea
after transformation until death
Potential Habitat
marine bathypelagic
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
Feeding occurs in water bodies such as rivers, lakes, or oceans.
lots of rain, summer not hot
Mass
cold winter, lots of coniferous trees: spruce, pine
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
Gestation
subtropical forest
islands and part of Australia, many unusual animals and plants
aquatic
water is cool or warm, cold in winter, you can swim in summer
Warm sea
{name} birthday
No results found
very deep, dark and cold, strange fish live here
polar
Blowhole color
On the map
all life stages
Female ♀
dry and hot summer, warm and rainy winter
Body color
tropical dry forest
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.
warm temperate humid
dry forest
birth year
lots of grass, few trees, rains occur
Maturity
Skin color
lots of rain, summer from warm to very hot
sq mm
yr
How similar?
Feeding occurs within an oceanic or saltwater environment.
water is almost always cold, there may be ice in winter, not hot in summer
squids
Male ♂
until the celebration
baby / chick
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?
octopuses
Very dry
Neither
flooded grassland
Young offspring still dependent on parental care.
squids
What do they eat?
Where do they live?
Marine world
warm and hot
water often floods the land, lots of grass
boreal forest
savanna
Temperate mixed forest
Very hot and dry
Duration
fish
saline marine habitat
Always hot and wet
This is me
Always very wet
Gamers
water almost always warm, swimmable even in winter, very hot in summer
Teeth count
How are they built?
marine
Cool summer and lots of rain
Temperate steppe
mm
Theoretical lifespan
arid
ml
Stars
Link copied
My age?
wk
My size?
very hot during the day, cold at night, almost no rain
Taiga
Asexual
water almost always cold, ice possible in winter, summers not hot
swap
floodplain
active predation
Mangrove forest
Rabbits, falcons, red-eared turtles hang out for 6-9 years and party on their birthday four times a year
Where do they take shelter?
Denotes a grassland or steppe habitat preference.
Warm summer and lots of rain
rainforest
Head color
celebrated their {n} birthday
When you would have been born if you lived as {name}
live squids
wet forest
Daddies
equatorial humid
Flukes color
the dark depths of the sea, below 1000 meters
Lifespan maximum
temperate rainforest
Polar Sea
Hermaphrodite ⚥
taiga
Cold sea
tropical rainforest
embryo
warm swampy shores with trees on roots, crabs live there
summer warm, many oaks, birches, maples
Length
kg
very hot and dry, rare rains, cacti live
lots of rain, warm and pleasant summer
Observations
◉{N} more on tap