The Indonesian coelacanth is a deep-sea fish that was once thought to be completely extinct. It is one of the oldest vertebrate species, preserved from ancient times almost unchanged.
The Indonesian coelacanth differs from most modern fish by its fleshy fins and special skull structure. It is important for science because it helps understand how ancient fish could come onto land and give rise to terrestrial vertebrates.
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
homogamy, reproduction always with fertilization, no alternation of generations
Offspring
Worker
Elders
Bro
birth time
ambush
normal sexual
Taxons
carnivore
if born as {name}
inhabit and develop in salty sea water
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
Predator remains still and concealed before launching a sudden attack.
Human
birth date
no permanent shelter
rest
Close
was
days
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Marine world
young are born live directly in sea water, not hatched from eggs or roe
The basics
How old you would be if you lived as {name}
caudal fin
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?
with mother
octopuses
spawning ground - place of egg-laying in the sea; may be protected, provide shelter, spawning pit or other structure
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
adult
Maturity
Refrigerator
primary food sources
Potential Habitat
About health
in the parent's pouch/mouth in seawater
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
Repro interval
results
Mass
sea
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
Sex
{name} birthday
Upcoming jubilees
Gremllins
mo
live fish
No results found
Ambush hunting
all seas and oceans
Trophic type
Filters
On the map
Yolk sac
all life stages
Female ♀
Body color
Upcoming birthdays
protection
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
Maturity
Age (from birth to death)
sq mm
yr
Lobed fins count
Wanderers
How similar?
Jubilee = every 10th birthday
squids
Male ♂
until the celebration
brooding in a pouch or mouth
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
Neither
Earliest developmental stage inside an egg or womb.
Business sausages
from birth to adulthood
squids
Lifespan average
What do they eat?
water is almost always cold, there may be ice in winter, not hot in summer
Where do they live?
Immature individual that has not yet reached reproductive maturity.
Marine world
the mother carries the baby in a pouch or mouth in sea water
live octopuses
What do they look like?
Maturity
emergence (insects)
end of lifespan
lateral line
How do they live?
fertilization / egg laying
How do they behave?
birth / hatching
metamorphosis / end of larval stage
fish
end of acceleration
Share
Duration
Find a pet...
Mature, fully developed individual capable of reproduction.
Cold sea
This is me
Actively hunting and capturing live prey.
Gamers
Pets
How are they built?
Indomalayan realm
mm
Theoretical lifespan
Indomalayan realm
ml
Stars
Link copied
My age?
wk
My size?
{name} jubilee
Asexual
swap
cm
Old-timers
Find an animal or breed...
Southeast Asia and islands, always hot and humid
active predation
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
When you would have been born if you lived as {name}
live squids
Lobed fins size
Litter size
Daddies
live birth in the sea
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
47 to 74 kilograms, 1.2 – 2.8 meters
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
Hermaphrodite ⚥
Where are they found?
all seas and oceans
Species lacks any fixed or lasting shelter structure.
embryo
Length
kg
egg-laying in seawater
Observations
◉{N} more on tap