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Aequidens rondoni

Aequidens rondoni
Image Credit: wikipedia


Aequidens rondoni It is a medium size fish of about 4 " Amazon River basin, in the upper Tapajós River basin, Brazil, South America.


(Click for details of Cichlid taxonomy)

Aequidens rondoni It was first described by Miranda Ribeiro, 1918 is placed in Genus Aequidens and subfamily Cichlasomatinae. The Genus "Aequidens" is derived from Latin words, aequus+equal+dens(teeth), which roughly translates to "Fish with equal teeth".


Aequidens rondoni It is medium fish with standard length(from tip of snout to begriming of tail fin) about 4 ". A. rondoni 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 rondoni It is found in Amazon River basin, in the upper Tapajós River basin, Brazil. It is benthopelagic or swims above river/stream bed at depths of about 1-3 m in black water rivers.


It is a carnivorous in nature, and eats small fish, deitrus .

Keeping in Aquarium

Water Parameters

Aequidens rondoni It is found in black water streams of upper Tapajós River basin, with a ph of 4.5-6 and dh range 3-9.

Tank Size and setup:

Aequidens rondoni A. rondoni are medium sized fish and should be kept 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 very aggressive but can be mildly 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 rondoni A. rondoni 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 rondoni
Common Name Acara cichlid.
Genus Aequidens
Subfamily Cichlasomatinae
Geographical Origin Amazon River basin, in the upper Tapajós River basin, Brazil
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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