Mordacia mordax is a species of lamprey from southeastern Australia. The larvae live in rivers and filter food from the water, while the adults live in the sea and feed on the blood of fish.
Mordacia mordax differs from other lampreys by its short head and special tooth pattern on the sucker. It is important for nature because it transfers substances from the sea to rivers and serves as food for predatory fish and birds.
homogamy, reproduction always with fertilization, no alternation of generations
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
parasitism
shallow coastal zones of rivers and lakes
g
t
When your next jubilee falls in {name} life years
Human
Dorsal fins color
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.
Captures food by straining water or substrate through specialized structures.
bacteria
adult
Maturity
organic debris
24 to 38 grams, 10 – 25 centimeters
About health
fish blood
When your next birthday would fall if you lived as {name}
carrion
results
summer warm, winter not very cold
Colors
Sex
Upcoming jubilees
scavenging, eat already dead animals
Gremllins
mo
Dorsal fins count
Uses an excavated underground tunnel or chamber for refuge or nesting.
all seas and oceans
Trophic type
Filters
Mediterranean forest
Upcoming birthdays
standing fresh waters — lakes, ponds, oxbow lakes
Breeding structure built or used for laying eggs and raising offspring.
both parents care
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
Age (juvenile)
Parasite
Age (from birth to death)
Age (embryo)
parasite
Wanderers
algae
world of Australasia
Jubilee = every 10th birthday
Draws prey or water into the mouth by creating negative pressure.
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
Oral hood size
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
fish tissues
Find a pet...
Mature, fully developed individual capable of reproduction.
Freshwater
water is cool or warm, cold in winter, comfortable to swim in summer
Pets
all rivers and lakes
Primary oral structure used to seize, manipulate, or ingest food.
freshwater cave
egg-laying
{name} jubilee
cm
Old-timers
Find an animal or breed...
mouth
turns
islands and part of Australia, many unusual animals and plants
Rascals
Flooded grasslands
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
Egg color
Where are they found?
all seas and oceans
all rivers and lakes
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
Offspring
Elders
Bro
lakes and ponds
normal sexual
freshwater marsh and wetlands
Taxons
if born as {name}
age
birth date
swimming
freshwater coastal and creek
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Marine world
The basics
My weight?
Oral hood color
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
primary food sources
detritus
burrow
Temperate sea
Potential Habitat
suction
filtration in larvae and external parasitism in adults
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
Feeding occurs in water bodies such as rivers, lakes, or oceans.
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
Gestation
freshwater fish
inhabit and develop in rivers, lakes, ponds, swamps, streams, and puddles
islands and part of Australia, many unusual animals and plants
aquatic
{name} birthday
No results found
On the map
all life stages
Female ♀
dry and hot summer, warm and rainy winter
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
Egg size
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
from birth to adulthood
nest
What do they eat?
Where do they live?
Immature individual that has not yet reached reproductive maturity.
Marine world
early young
water often floods the land, lots of grass
bacteriophagy, specifically catch and eat tiny bacteria and other microbes
Freshwater
Temperate mixed forest
Gill pores color
Duration
filter feeding
This is me
freshwater
Gamers
aquatic plants and algae
How are they built?
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
Asexual
swap
freshwater environment — rivers, lakes, ponds, swamps
live fish from rivers, lakes, ponds and other freshwater bodies
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
Sucker mouth color
When you would have been born if you lived as {name}
Daddies
Gill pores count
Lifespan maximum
world of Australasia
Hermaphrodite ⚥
Tomato
embryo
underground freshwater bodies — karst caves with water
summer warm, many oaks, birches, maples
Length
Sucker mouth size
kg
Observations
◉{N} more on tap