The blue whale is the largest animal on Earth. This marine mammal has a long body of bluish-gray color, lives in oceans, and feeds on small crustaceans.
The blue whale differs from other whales by its enormous size, long body, and small dorsal fin. It is important for the ocean because its feces fertilize the water and help plankton grow, which provides oxygen to the entire planet.
Worker
sea almost always under thick ice, very cold
birth time
Pelagic Ocean
breeding
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
days
marine pelagic
live octopuses, squids
How old you would be if you lived as {name}
crustaceans
Antarctic and other krill
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.
Baleen plates size
small planktonic crustaceans — copepods, krill
Captures food by straining water or substrate through specialized structures.
adult
Maturity
cephalopods
About health
marine coastal
milk
When your next birthday would fall if you lived as {name}
plankton
Truck
Repro interval
results
Polar sea
Blowholes count
Colors
Sex
Upcoming jubilees
Gremllins
mo
live fish
all seas and oceans
Trophic type
Filters
Upcoming birthdays
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
Age (juvenile)
Age (from birth to death)
Age (embryo)
most of Europe and Asia, various forests, steppes and tundra
Wanderers
far from shore, deep water, large whales and sharks live here
world of Australasia
Jubilee = every 10th birthday
Draws prey or water into the mouth by creating negative pressure.
Earliest developmental stage inside an egg or womb.
Business sausages
the twilight zone of the sea, 200–1000 meters depth
Lifespan average
Temperate Sea
water is almost always cold, there may be ice in winter, not hot in summer
Cold Sea
What do they look like?
Maturity
emergence (insects)
end of lifespan
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
Pectoral flippers color
Find a pet...
Mature, fully developed individual capable of reproduction.
Cold sea
very cold, lots of snow and ice
water is cool or warm, cold in winter, comfortable to swim in summer
small crustaceans
Pets
sea almost always under thick ice, very cold
Pectoral flippers count
{name} jubilee
Tail flukes size
cm
Old-timers
Find an animal or breed...
turns
Rascals
drink mother's milk in childhood
Dorsal fin count
Litter size
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
more than 0.35 tons, from 2.5 meters
°C
Not specified
pelagic zone — open water far from shore and seabed
Where are they found?
all seas and oceans
Species lacks any fixed or lasting shelter structure.
Dorsal fin size
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
Elders
Bro
Very cold
Taxons
Temperate sea
carnivore
if born as {name}
inhabit and develop in salty sea water
water cool or warm, cold in winter, swimmable in summer
age
birth date
bristles
Palearctic realm
swimming
no permanent shelter
planktivory, eat small creatures that float in the water and cannot swim against the current
rest
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Marine world
marine epipelagic
young are born live directly in sea water, not hatched from eggs or roe
The basics
My weight?
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
Temperate sea
after transformation until death
Potential Habitat
suction
marine bathypelagic
filter
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.
Mass
sea
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
Gestation
islands and part of Australia, many unusual animals and plants
aquatic
water is cool or warm, cold in winter, you can swim in summer
{name} birthday
Nearctic realm
No results found
North America and Greenland, from tundra to forests
polar
On the map
small crustaceans
all life stages
Female ♀
Body color
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.
birth year
Shelter used specifically for reproduction or nesting.
Maturity
krill
sq mm
yr
How similar?
Tail flukes color
Tail flukes count
water is almost always cold, there may be ice in winter, not hot in summer
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?
Neither
Young offspring still dependent on parental care.
What do they eat?
Where do they live?
Marine world
Baleen plates color
pelagic — swim in the open sea, away from the bottom and shore
Duration
filter feeding
saline marine habitat
This is me
Gamers
How are they built?
marine
shallow near the shore, water rises and falls, crabs live here
mm
Theoretical lifespan
Baleen plates count
ml
Stars
Link copied
coastal marine zone — shelf, neritic zone
My age?
wk
My size?
sea almost always covered with thick ice, very cold all year round
water filtration through baleen
Dorsal fin color
Asexual
water almost always cold, ice possible in winter, summers not hot
swap
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?
Pectoral flippers size
celebrated their {n} birthday
When you would have been born if you lived as {name}
Littoral Zone
Daddies
live birth in the sea
small crabs, amphipods and other crustaceans
the dark depths of the sea, below 1000 meters
Lifespan maximum
krill
Polar Sea
Hermaphrodite ⚥
Cold sea
embryo
Length
kg
in the open sea
Observations
◉{N} more on tap