Pseudochondrostoma Willkommi is a freshwater fish from the carp family. It lives in rivers in southern Spain and Portugal and feeds on algae on rocks.
The species differs from related nases by the lower mouth and preference for fast rivers with clean water. It is important as an indicator of river purity, being sensitive to pollution, and helps maintain the diversity of aquatic ecosystems.
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Immature form that undergoes metamorphosis before adulthood.
Offspring
Worker
Elders
small invertebrates
Bro
scraping
birth time
lakes and ponds
Taxons
if born as {name}
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
shallow coastal zones of rivers and lakes
g
age
t
When your next jubilee falls in {name} life years
Human
birth date
no permanent shelter
Palearctic realm
freshwater coastal and creek
Close
detritus, eat dead remains of plants, animals and all kinds of organic debris on the bottom
was
days
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
The basics
How old you would be if you lived as {name}
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
organic debris
Mouth size
primary food sources
Coconut
Potential Habitat
About health
Searches for food on or among rocks and stony surfaces.
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
summer warm and almost no rain
Mass
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
Body size
biofilm on stones and surfaces in water — algae, bacteria, protozoa (afvukhs)
Colors
Sex
{name} birthday
Upcoming jubilees
Gremllins
mo
No results found
Trophic type
Caudal fin count
Filters
On the map
all life stages
Female ♀
dry and hot summer, warm and rainy winter
Palearctic realm
Mediterranean forest
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.
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
Height
birth year
Maturity
Age (from birth to death)
rock
sq mm
yr
most of Europe and Asia, various forests, steppes and tundra
Wanderers
How similar?
algae
Jubilee = every 10th birthday
periphyton and biofilm
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?
small invertebrates without further specification
Neither
Earliest developmental stage inside an egg or womb.
Business sausages
from birth to adulthood
Scales count
Lifespan average
What do they eat?
Where do they live?
Immature individual that has not yet reached reproductive maturity.
Regeneration
early young
What do they look like?
Maturity
emergence (insects)
end of lifespan
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.
Freshwater
This is me
Warm summer with almost no rain
most of Europe and Asia, various forests, steppes and tundra
freshwater
from 0.5 to 0.8 kilograms, 0.5 – 1 meter
Gamers
aquatic plants and algae
Pets
How are they built?
all rivers and lakes
Primary oral structure used to seize, manipulate, or ingest food.
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
{name} jubilee
Asexual
swap
freshwater environment — rivers, lakes, ponds, swamps
cm
Old-timers
Find an animal or breed...
mouth
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
Dorsal fin count
When you would have been born if you lived as {name}
Litter size
rocky riverbed
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.
Where are they found?
Species lacks any fixed or lasting shelter structure.
embryo
all rivers and lakes
herbivore
Length
kg
Observations
◉{N} more on tap