Bigtooth River Stingray - Potamotrygon henlei

Species name: Potamotrygon henlei

Common Names: Bigtooth river stingray

Family: Potamotrygonidae (River stingrays)

Order: Rajiformes (skates and rays)

Class: Elasmobranchii (sharks and rays)

Max. size: 45 cm WD / 17 inches WD

Environment: Freshwater

Origin: South America. Tocantins River basin

Temperament: . Timid. Do not keep with territorial fishes.

Company: . Other rays and non aggressive fishes.

Water parameters: pH 5.8-7.2, dH 4-15, temperature 23-28°C / 74 - 80° F

Aquarium setup: Potamotrygon henlei requires aquariums with lot of free bottom space. Since rays are cartilaginous (lack gas bladders) they need to be constantly in motion. This means that rays needs big aquariums. Even a very small specimen should not be kept in less then 100 G. Good water conditions are very important. Good filtration and regular water changes are therefore very important. Keep track of ammonia, nitrite, and nitrate. Keep hard décor to a minimum. Fine, round sand or a clinical aquarium is preferable. Bigtooth river stingrays are sensitive to many chemicals and its recommended to get advice before using medicines in tanks with rays.

Feeding: Blood worms, earth worms, krill, cocktail shrimp,clams, cut beef heart, fish fillet, live fish. Goldfish feeders is not enough to sustain this fish.

Breeding: Sexing is easy when males got modified pelvic fins for genetic transference, females do not. Rays have internal fertilization and gives birth to live young.

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