Bleekeria mitsukurii is a marine nudibranch mollusk with a bright body. It lives on coral reefs in warm seas and feeds on sponges.
Bleekeria mitsukurii differs by its bright coloration and ability to regenerate appendages. It is important for reefs because it controls the growth of sponges and serves as food for some fish.
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Rhinophores size
Immature form that undergoes metamorphosis before adulthood.
Offspring
Worker
Elders
Bro
scraping
birth time
Taxons
carnivore
if born as {name}
Dogs, dolphins, lynx hang out for 9-25 years and party on their birthday three times a year
Rhinophores count
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
no permanent shelter
Cerata size
Close
was
days
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Marine world
The basics
Cerata count
How old you would be if you lived as {name}
jellyfish
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?
Rasping or abrading food surfaces with teeth or mouthparts.
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
adult
Maturity
primary food sources
teeth
Complex coral or rocky structures teeming with marine life.
Potential Habitat
About health
Velum size
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
Oceanian realm
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
Body size
Colors
Sex
Warm sea
{name} birthday
Upcoming jubilees
Gremllins
mo
Rhinophores color
No results found
all seas and oceans
Trophic type
Filters
live sponges — marine and freshwater
On the map
all life stages
Female ♀
Body color
Upcoming birthdays
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.
live jellyfish
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
Oceanian realm
birth year
Maturity
Age (juvenile)
Age (from birth to death)
sq mm
yr
Age (embryo)
Wanderers
Age (larva)
Velum count
How similar?
seabed
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?
reef
Neither
Earliest developmental stage inside an egg or womb.
Business sausages
from birth to adulthood
Lifespan average
What do they eat?
Where do they live?
young after fast growth
Velum color
Immature individual that has not yet reached reproductive maturity.
from birth to death
Marine world
Regeneration
Juvenile stage following larval metamorphosis but not yet adult.
early young
Hard dental structures used to bite, tear, or scrape food.
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
end of acceleration
Share
Duration
Find a pet...
Mature, fully developed individual capable of reproduction.
many islands in the Pacific Ocean, warm seas and corals
This is me
Actively hunting and capturing live prey.
Gamers
Pets
How are they built?
Indomalayan realm
Cerata color
mm
Indomalayan realm
Theoretical lifespan
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?
many islands in the Pacific Ocean, warm seas and corals
celebrated their {n} birthday
When you would have been born if you lived as {name}
Litter size
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
foraging
°C
Not specified
Hermaphrodite ⚥
Actively searching habitats to locate food items.
Grape
Where are they found?
all seas and oceans
8 to 11 grams, 1.5 – 8 centimeters
Species lacks any fixed or lasting shelter structure.
embryo
sponges
Length
kg
Observations
◉{N} more on tap