Polynemus multifilis is a fish with seven or eight long filaments on the pectoral fins. These filaments help it find food in the murky waters of rivers and coastal zones of Southeast Asia.
Polynemus multifilis differs from other fish by its very long filaments on the pectoral fins, which function as sensory organs. It is important in nature as a predator that controls the population of small animals, and as food for larger fish.
Immature form that undergoes metamorphosis before adulthood.
Worker
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
very hot and very humid all year round, rain almost every day
days
worms
How old you would be if you lived as {name}
Pectoral filaments size
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.
adult
Maturity
fish of small size
crabs
South and Central America, hot and humid, huge forests
live marine and freshwater shrimps
About health
When your next birthday would fall if you lived as {name}
Repro interval
results
Southeast Asia and islands, always hot and humid
bottom
Colors
Sex
Upcoming jubilees
Gremllins
mo
all seas and oceans
Trophic type
Filters
small fish
always hot and humid, huge trees and vines
Upcoming birthdays
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
Age (from birth to death)
Wanderers
Jubilee = every 10th birthday
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
Pectoral filaments color
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.
Freshwater
Actively hunting and capturing live prey.
where the river flows into the sea, slightly salty water, lots of fish and birds
65 to 130 grams, 25 – 60 centimeters
Pets
all rivers and lakes
Indomalayan realm
Primary oral structure used to seize, manipulate, or ingest food.
Indomalayan realm
Mangrove thickets
{name} jubilee
cm
Old-timers
Find an animal or breed...
mouth
turns
Rascals
Flooded grasslands
Litter size
live crabs, shrimps, lobsters
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
Actively searching habitats to locate food items.
Where are they found?
all seas and oceans
Species lacks any fixed or lasting shelter structure.
all rivers and lakes
insects living in water or near water — mayflies, caddisflies, stoneflies
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Offspring
Tropical moist forest
Elders
Bro
freshwater marsh and wetlands
Taxons
carnivore
if born as {name}
age
water is almost always warm, even in winter you can swim, very hot in summer
birth date
no permanent shelter
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Marine world
The basics
Neotropical realm
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
young after transformation
primary food sources
Potential Habitat
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
Mass
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
Warm sea
{name} birthday
live annelid worms
aquatic insects
No results found
Pectoral filaments count
On the map
lunge
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?
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
water often floods the land, lots of grass
River estuary into the sea
Freshwater
Duration
Always hot and wet
This is me
freshwater
Gamers
How are they built?
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
Dorsal fin color
Asexual
swap
freshwater environment — rivers, lakes, ponds, swamps
Southeast Asia and islands, always hot and humid
active predation
coastal
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
foraging
river
Hermaphrodite ⚥
shrimp
embryo
Carrot
warm swampy shores with trees on roots, crabs live there
Length
kg
Rapid forward strike to seize prey.
Observations
◉{N} more on tap