Hyphessobrycon khardinae is a small schooling fish from the characin family. It lives in the fresh rivers of the Tapajos basin in Brazil and has a bright coloration.
Hyphessobrycon khardinae differs from related tetras by its special red body shade and the shape of the spot near the tail. It serves as food for larger fish and helps maintain the balance of small organisms in the river.
Locomotion through water employed while searching for or capturing prey.
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
Tropical moist forest
Worker
Elders
Bro
birth time
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
omnivore
daphnia
g
age
t
When your next jubilee falls in {name} life years
Human
birth date
swimming
no permanent shelter
Close
water column
very hot and very humid all year round, rain almost every day
was
days
South and Central America, hot and humid, huge forests
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}
Neotropical realm
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
surface
adult
Maturity
primary food sources
Neotropical realm
plant
South and Central America, hot and humid, huge forests
Potential Habitat
About health
When your next birthday would fall if you lived as {name}
d
In husbandry
Feeds while suspended in open water between surface and bottom.
On the go from 1.3 to 3.5 years. Forest mice, anoles, rainbow fish party on their birthday once a month
Feeding occurs in water bodies such as rivers, lakes, or oceans.
Repro interval
results
Mass
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
Body size
aquatic
Colors
Caudal fin color
Sex
{name} birthday
Upcoming jubilees
Gremllins
mo
Food is gathered directly from leaf surfaces.
No results found
Trophic type
Filters
Eyes color
On the map
lunge
all life stages
Female ♀
Body color
always hot and humid, huge trees and vines
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
Sweeps open mouth through water to scoop up fish or invertebrates.
leaf
up to ~3 grams, up to 3 centimeters
birth year
Maturity
insect larvae and caterpillars
Age (from birth to death)
sq mm
yr
Wanderers
Food items are collected from exposed outer surfaces of substrates.
Body count
How similar?
algae
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
Lifespan average
What do they eat?
insect larvae
Where do they live?
young after fast growth
Immature individual that has not yet reached reproductive maturity.
Juvenile stage following larval metamorphosis but not yet adult.
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
scooping
Always hot and wet
This is me
freshwater
Actively hunting and capturing live prey.
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
daphnia and cladoceran crustaceans in fresh water
My age?
wk
My size?
{name} jubilee
Dorsal fin color
Asexual
swap
freshwater environment — rivers, lakes, ponds, swamps
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?
celebrated their {n} birthday
When you would have been born if you lived as {name}
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
foraging
river
°C
Not specified
Sand grain
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
Length
kg
Rapid forward strike to seize prey.
Observations
◉{N} more on tap