The Caspian lamprey is an ancient jawless fish that lives in the Caspian Sea. For reproduction, it ascends rivers, where larvae develop in the bottom sediment.
The Caspian lamprey differs from the sea lamprey in its smaller size and features of the dental apparatus. It is important for nature as a parasite affecting fish populations and as part of the food chain in the Caspian basin.
homogamy, reproduction always with fertilization, no alternation of generations
Immature form that undergoes metamorphosis before adulthood.
Worker
Oral disc size
birth time
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
t
When your next jubilee falls in {name} life years
Human
feeding
fish tissues
detritus, eat dead remains of plants, animals and all kinds of organic debris on the bottom
days
Warm summer
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.
eyes
Captures food by straining water or substrate through specialized structures.
bacteria
adult
Maturity
organic debris
About health
When your next birthday would fall if you lived as {name}
carrion
results
protection from predators
summer warm, winter not very cold
Colors
sea
Sex
Upcoming jubilees
scavenging, eat already dead animals
Gremllins
mo
Teeth color
Uses an excavated underground tunnel or chamber for refuge or nesting.
all seas and oceans
Trophic type
Filters
Palearctic realm
Upcoming birthdays
standing fresh waters — lakes, ponds, oxbow lakes
both parents care
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
Desert and dry shrubs
Parasite
Age (from birth to death)
most of Europe and Asia, various forests, steppes and tundra
parasite
Wanderers
algae
Jubilee = every 10th birthday
Egg membrane size
Draws prey or water into the mouth by creating negative pressure.
Earliest developmental stage inside an egg or womb.
Freshwater habitat consisting of flowing river channels and banks.
Business sausages
Lifespan average
Body temp
Regeneration
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
swampy freshwater biotopes — peat bogs, marshes, river mangroves
Find a pet...
Mature, fully developed individual capable of reproduction.
water is cool or warm, cold in winter, comfortable to swim in summer
65 to 130 grams, 25 – 60 centimeters
Pets
egg-laying
{name} jubilee
Eyes size
cm
Old-timers
Find an animal or breed...
turns
Rascals
Teeth size
Litter size
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
Where are they found?
all rivers and lakes
fish blood
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Offspring
Elders
Bro
lakes and ponds
normal sexual
freshwater marsh and wetlands
Taxons
if born as {name}
age
birth date
rivers
Palearctic realm
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
The basics
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
Mouth size
primary food sources
detritus
burrow
Temperate sea
Potential Habitat
suction
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
fresh water
spawning ground in fresh water, both parents do nothing
Mass
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
inhabit and develop in rivers, lakes, ponds, swamps, streams, and puddles
{name} birthday
No results found
Eyes color
On the map
all life stages
Female ♀
Body color
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.
birth year
Maturity
sq mm
yr
How similar?
spawning ground - place of egg-laying in a river or lake; the clutch may be guarded, covered, or a spawning pit
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
What do they eat?
Where do they live?
Marine world
early young
bacteriophagy, specifically catch and eat tiny bacteria and other microbes
Freshwater
Egg membrane color
Temperate mixed forest
Duration
filter feeding
Oral disc color
This is me
most of Europe and Asia, various forests, steppes and tundra
freshwater
Gamers
aquatic plants and algae
Teeth count
How are they built?
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
Asexual
filtration
swap
freshwater environment — rivers, lakes, ponds, swamps
Rabbits, falcons, red-eared turtles hang out for 6-9 years and party on their birthday four times a year
Where do they take shelter?
celebrated their {n} birthday
When you would have been born if you lived as {name}
Daddies
Lifespan maximum
Hermaphrodite ⚥
embryo
Carrot
summer warm, many oaks, birches, maples
Length
kg
very hot and dry, rare rains, cacti live
Observations
◉{N} more on tap