Repomucenus calcaratus is a small marine bottom-dwelling fish from the family of dragonets. It lives on sandy or muddy bottoms in coastal waters and has venomous spines on its head and fins.
Repomucenus calcaratus differs from related species in the shape of the venomous spine on the gill cover and the coloration of males. This fish is important for the marine ecosystem because it eats small invertebrates and serves as food for larger fish.
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
Worker
Elders
Bro
birth time
mysids
bottom
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
t
When your next jubilee falls in {name} life years
water is almost always warm, even in winter you can swim, very hot in summer
Human
birth date
swimming
Close
Preopercular spine size
was
days
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Marine world
worms
The basics
How old you would be if you lived as {name}
Venomous
suction
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
Captures food by straining water or substrate through specialized structures.
adult
Maturity
Preopercular spine color
Preopercular spine count
primary food sources
polychaetes
burrow
Temperate sea
Potential Habitat
About health
suction
marine coastal
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
Feeding occurs in water bodies such as rivers, lakes, or oceans.
results
Mass
annelid polychaetes of marine habitats
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
terrestrial
Eyes count
islands and part of Australia, many unusual animals and plants
aquatic
Sex
Warm sea
{name} birthday
Upcoming jubilees
live annelid worms
Gremllins
mo
Uses an excavated underground tunnel or chamber for refuge or nesting.
No results found
all seas and oceans
Trophic type
Filters
Eyes color
On the map
small crustaceans
all life stages
Female ♀
Body color
muddy bottom
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
birth year
Maturity
Age (from birth to death)
sq mm
yr
Foraging occurs on the floor of aquatic or terrestrial habitats.
Wanderers
How similar?
First dorsal fin color
world of Australasia
Jubilee = every 10th birthday
Male ♂
until the celebration
age as {name}
How do they breed?
Draws prey or water into the mouth by creating negative pressure.
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
Mouthpart modified to create suction for ingesting food or anchoring.
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
What do they eat?
Where do they live?
Marine world
early young
What do they look like?
Maturity
emergence (insects)
end of lifespan
River estuary into the sea
Freshwater
How do they live?
fertilization / egg laying
Produces toxins capable of causing harm when delivered.
How do they behave?
birth / hatching
Egg membrane color
metamorphosis / end of larval stage
end of acceleration
Share
Duration
Find a pet...
Mature, fully developed individual capable of reproduction.
filter feeding
Pectoral fins color
saline marine habitat
This is me
water is cool or warm, cold in winter, comfortable to swim in summer
Gamers
where the river flows into the sea, slightly salty water, lots of fish and birds
Mysids — small planktonic crustaceans
Pets
How are they built?
marine
shallow near the shore, water rises and falls, crabs live here
mm
Theoretical lifespan
ml
Stars
Link copied
coastal marine zone — shelf, neritic zone
My age?
wk
My size?
Feeding occurs primarily on land or in vegetation.
{name} jubilee
Asexual
swap
cm
First dorsal fin size
Old-timers
Find an animal or breed...
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}
Littoral Zone
Litter size
Daddies
small crabs, amphipods and other crustaceans
Lifespan maximum
sandy bottom
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 ⚥
Grape
Where are they found?
all seas and oceans
8 to 11 grams, 1.5 – 8 centimeters
embryo
all rivers and lakes
Length
kg
Observations
◉{N} more on tap