Monday,26 July 2021, 4 : 22 PM

Aequidens epae

Aequidens epae
Aequidens epae
Image Credit: Stawikowski, Rainer


Aequidens epae is a medium sized fish of about 4.5 " found in Brazil, South America.


(Click for details of Cichlid taxonomy)

Aequidens epae was first described by Kullander in 1995 , and has been placed in Genus Aequidens and subfamily Cichlasomatinae.
The Genus "Aequidens" is derived from Latin words, equips+equal+dens(teeth), which roughly translates to "Fish with equal teeth".
The species name is given in recognization of Expedição Permanente da Amazônia (EPA) set up by Museum of Zoology of the University of São Paulo.

Distribution & Habitat

Aequidens epae is found in Brazil, State of Pará, Río Tapajós drainage, igarapé in Barreirinha.
It is benthopelagic or swims above river bed at depths of about 1-3 m in clear water streams.
It is a opportunistic feeder and is omnivorous in nature, eating everything from small insects, fish, algae etc.


It is a medium sized fish having a Standard Length 4.5".
It has a slender body with the depth being 42-48% of SL.
The Aequidens species is characterized by having a tri serial per dorsal fin arrangement and E1 scales either 24 or 25.
A. epae is quiet similar to A. diadema, A. gerciliae, A. metae all have stripes on face and dorsal scales have black stripes.
However it can be differentiated by by these species by having a dark band from mid lateral spot which inclines towards tail instead of vertical.
It can also be distinguished from similar looking A. gerciliae by entire tail fin (caudal) covered with hyaline(white) spots instead to having these spots in back of dorsal fin, also the lateral band is thinner, E1 scales as 24, instead of more common 25.
Aequidens epae is known to live for 8-10 years.

Keeping in Aquarium

Aequidens epae has not been studied in detail yet, and not much information is available on its aquarium requirements.
They need soft water and acidic water with a pH of 6.5-6.9.
The species live in tropical South American rivers and the recommended water temperature in the aquarium is 21-28°C / 70-83°F

Species Snapshot

Species Card

Particulars Details
Scientific Name Aequidens epae
Common Name Aequidens epae
Genus Aequidens
Subfamily Cichlasomatinae
Geographical Origin Brazil, South America,Jacareacanga and São Luis on the lower Rio Tapajós
Diet Omnivore
Gender Differences Dimorphic
Breeding Substrate Spawner
Temperament Aggressive
Con Specific Temperament Aggressive
Water hardness Soft, dh range 3-9
Difficulty Level in Aquariums

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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