Common loach is a small scaleless fish with a large head. It lives on the bottom of clean cold rivers and streams in Europe and hides under stones.
The stone loach differs from other fish by the absence of scales and the habit of living under stones. It is important for nature because it eats insect larvae and serves as food for large fish, and also indicates the purity of water in the river.
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
Bro
birth time
ambush
Taxons
carnivore
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
g
age
summer mild, +15…+20 °C
t
When your next jubilee falls in {name} life years
Predator remains still and concealed before launching a sudden attack.
Human
birth date
Head size
no permanent shelter
Palearctic realm
Close
was
very cold, short summer, almost no trees, lots of moss
days
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
worms
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?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
adult
Maturity
fish of small size
primary food sources
Potential Habitat
About health
lake
Pectoral fins count
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
lots of rain, summer not hot
Mass
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
Gestation
Colors
Cool summer
Sex
{name} birthday
Upcoming jubilees
live annelid worms
Gremllins
mo
No results found
Trophic type
Filters
small fish
On the map
Small, narrow flowing freshwater course, usually in upland terrain.
lunge
small crustaceans
Large inland standing freshwater body supporting diverse aquatic and shoreline species.
all life stages
Female ♀
Palearctic realm
Body color
river
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.
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
Non-saline aquatic environments such as rivers and lakes.
warm temperate humid
birth year
Maturity
Skin color
16 to 24 grams, 7 – 12 centimeters
Age (juvenile)
insect larvae and caterpillars
Age (from birth to death)
sq mm
yr
Age (embryo)
most of Europe and Asia, various forests, steppes and tundra
Wanderers
How similar?
Egg size
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?
Tundra
Neither
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
What do they eat?
insect larvae
Where do they live?
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
stream
Share
Duration
Find a pet...
Mature, fully developed individual capable of reproduction.
Freshwater
Egg count
This is me
most of Europe and Asia, various forests, steppes and tundra
Actively hunting and capturing live prey.
Gamers
Pets
How are they built?
all rivers and lakes
Cool summer and lots of rain
Primary oral structure used to seize, manipulate, or ingest food.
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
Lots of rain and cool summer
freshwater
Flowing freshwater channel within a defined bed.
{name} jubilee
Asexual
swap
cm
Old-timers
Find an animal or breed...
active predation
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?
Head color
celebrated their {n} birthday
When you would have been born if you lived as {name}
Litter size
Daddies
small crabs, amphipods and other crustaceans
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
Hermaphrodite ⚥
Egg color
Where are they found?
Mandarin
Species lacks any fixed or lasting shelter structure.
embryo
all rivers and lakes
Length
kg
Rapid forward strike to seize prey.
cool
lots of rain, cool summer, snow in winter
Observations
◉{N} more on tap