Zeigler's aeolid is a small nudibranch mollusk. It is a sea slug with bright outgrowths on its back that lives in cold waters.
Zeigel's sea slug is distinguished by the special arrangement of its cerata and adaptation to cold water. It helps control the population of hydroids and serves as food for other marine animals.
estuary and delta
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
birth time
lakes and ponds
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
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?
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
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
Repro interval
results
Mass
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
Colors
Sex
{name} birthday
Upcoming jubilees
Gremllins
mo
Rhinophores color
No results found
all seas and oceans
Trophic type
Filters
On the map
all life stages
Female ♀
Body color
Upcoming birthdays
standing fresh waters — lakes, ponds, oxbow lakes
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
up to ~3 grams, up to 3 centimeters
birth year
Maturity
Age (juvenile)
Age (from birth to death)
sq mm
yr
Age (embryo)
Wanderers
Age (larva)
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?
Neither
Earliest developmental stage inside an egg or womb.
Business sausages
from birth to adulthood
zones of mixing fresh and sea water — river deltas, estuaries
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?
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
What do they look like?
Maturity
emergence (insects)
end of lifespan
River estuary into the sea
Freshwater
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.
Cold sea
saline marine habitat
This is me
freshwater
Actively hunting and capturing live prey.
Gamers
where the river flows into the sea, slightly salty water, lots of fish and birds
Pets
How are they built?
marine
Cerata color
shallow near the shore, water rises and falls, crabs live here
mm
Theoretical lifespan
ml
Stars
Link copied
coastal marine zone — shelf, neritic zone
My age?
wk
My size?
{name} jubilee
Asexual
swap
freshwater environment — rivers, lakes, ponds, swamps
cm
Subpolar sea
Old-timers
Find an animal or breed...
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}
Littoral Zone
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
°C
Not specified
the sea is covered with ice most of the year or has many ice floes, very cold in winter
Hermaphrodite ⚥
Sand grain
Where are they found?
all seas and oceans
Species lacks any fixed or lasting shelter structure.
embryo
all rivers and lakes
Length
kg
Observations
◉{N} more on tap