Monday,26 July 2021, 5 : 00 PM

Aequidens patricki

Aequidens patricki
Image Credit: wikipedia


Aequidens patricki It is a medium sized fish of about 4" found in Austria and Pachitea rivers of the Amazon River basin, Peru, South America.


(Click for details of Cichlid taxonomy)

Aequidens patricki was first described by Kullander in 1984 and is been placed in Genus Aequidens under subfamily Cichlasomatinae.
The Genus "Aequidens" is derived from Latin words, aequus+equal+dens(teeth), which roughly translates to "Fish with equal teeth".


Aequidens patricki is a medium fish with standard length about 4 ".
It has a typical tri serial pre dorsal arrangement of scales of its Aequidens with E1 scales 25 or 26.
It is known to live for 8-10 years.

Distribution & Habitat

Aequidens patricki is found in South america,Rio Aguaytia & Rio Pachitea, Peru.
It is benthopelagic or swims above river/stream bed at depths of about 1-3 m in black water rivers.
It is relatively rare in aquarium hobby but seen sometimes.


It is a omnivorous in nature, and eats small fish, deitrus, small plats, algae etc.

Keeping in Aquarium

Water Parameters

Aequidens patricki is found in running waters of Rivers Aguaytia & Pachitea, Peru, South America with a ph of 4.5-6 and dh range 3-9.

Tank Size and setup:

Aequidens patricki is a medium size fish and can be housed in a aquarium of about 300 liters with good filtration.
A sand bed of fine sand and many shelters with rocks and driftwood are ideal for this fish. They are not aggressive but very aggressive to others of same species.
At breeding time the aggression increases.
Small fish should not be kept with them as it will be eaten.


Aequidens patricki are dimorphic, and reach sexual maturity in about 9-11 months.
They lay eggs on flat surfaces and practice brood care.
Both parents take care of eggs and larvae.
The females are smaller and will clean a piece of flat rock and lay 500-600 eggs.
The eggs will hatch after 2-3 days and fry will be free swimming within a week.
Fry can be fed brine shrimp.
. The pair will be ready to breed again if the fry are removed early.

Species Snapshot

Species Card

Particulars Details
Scientific Name Aequidens patricki
Common Name Patrick_s acara
Genus Aequidens
Subfamily Cichlasomatinae
Geographical Origin restricted to the AguaytĂ­a and Pachitea rivers of the Amazon River basin, Peru.
Diet Carnivore
Gender Differences Dimorphic
Breeding Substrate Spawner
Temperament Aggessive
Con Specific Temperament Mildly Aggressive
Water hardness Soft, dh range 3-9
Difficulty Level in Aquariums 3

Morphometric Data

Particulars Details
Total Length(inches)
Standard Length(inches)

Measurements as % of Total Length

Particulars Details
Body Depth  %
Head length  %
Pre Dorsal length  %
Pre Pectoral length  %
Pre Anal length  %
Pre Pelvic length  %
Caudal Peduncle Depth  %
Caudal Peduncle Length  %
Fork length  %
Length of Last Dorsal Fin Spine  %
Pectoral Fin Length  %
Pelvic Fin Length  %

Measurements as % of Head Length

Particulars Details
Head Width  %
Snout length  %
Eye diameter  %
Pre Orbital Length  %
Inter Orbital Width  %
Pre Orbital Depth  %

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