The Black Diamond stingray originates from Sao Felix in the Rio Xingu basin, and in Rio Fresco – both of which are located in central Brazil.
They are bottom-dwellers that like to coast through sandy or muddy flats, lying near rocky reefs and thick kelp forests.
Black Diamond Stingray Size
The average Black Diamond stingray can grow to be 24 inches in diameter. As such, be mindful of this before purchasing a tank.
Most stingrays are sold as babies, so even if they appear comically small in their large tanks at first, they will eventually grow into their new environment. It only requires a good two to three years of maturity.
Stingrays can live for surprisingly long amounts of time.
The male stingray lifespan can reach up to 19 years, and a female’s lifespan can be as long as 28 years. If they are well-cared for, they’re long-term pets.
Types of Black Diamond Stingray
They are three types of Black Diamond stingray—Thousand Island, Eclipse, and Big Spot.
This variety has numerous small, white spots peppered all along its body. Its larger spots tend to cluster around the middle of their disc.
Eclipse stingrays have a ring-shaped pattern circling its disc, with dark spots blotting its surface.
This results in unique disc patterns that look they’re forming lines or letter shapes.
As their name implies, Big Spot Black Diamond stingrays were given their name due to the large white spots peppered symmetrically around the ray’s disc.
Each Big Spot’s pattern is unique to that ray alone – like fingerprints or tiger stripes.
Keeping in a tank
Freshwater rays are very sensitive to ammonia, nitrites, and nitrates content in water, that’s why it is important to have an understanding of a nitrogen cycle and keep the tank water crystal clear.
The latter is quite a challenging task since rays produce a large amount of ammonia. Large-sized tanks, efficient biological filtration, and regular water renews – is the only way to keep the proper tank and water conditions.
Most freshwater rays can be kept in a tank at PH from 6,8 to 7,6, alcalinity from 1° to 4° (from 18 to 70 ppm) and water temperature from 24 to 26°C. Ammonia and nitrites level should be zero, and nitrates level should be lower than 10 10 ppm.
In terms of the tank size for rays, the following approach works best – the larger, the better. The walls height is not a crucial parameter, but the tank should be from 180 to 220 cm long and from 60 to 90 cm wide to keep a ray in it for a long time.
A tank from 350 to 500 liters capacity will do to keep young rays in it, but for a long-term keeping of adult species, you will need a tank not less than 1000 liters large. Small-grained sand can be used as the tank substrate.
Freshwater rays are flesh-eaters that feed mainly with fish and crustaceans in the wild. These are active fishes with high metabolism level, and that’s why you should feed them at least twice a day.
They are also known as gluttonous ones, thus the food for them will be quite costly for you. In general, the motoro stingray diest should be natural, though some may eat artificial food.
Young species eat live or frozen blood worm, tubifex, brine shrimps, prawns, etc., while adult ones should be fed with the food of larger size. It can be whole mussels, shellfishes, prawns, calamaries or fish juveniles (or some other fresh fish), and earthworms. Diverse diest is a must to keep the motoro stingray in its best condition.
Rays spend most of their time on the bottom. Their eyes and branchial apertures are on top of the body, which allows the fish to spend time under the sand waiting for food. They have perfect eyesight, and they jump out of the sand to catch their prey.
Other kinds of rays will be the best tank mates for stingray. Although Cichlasoma severum, Geophagus, silver arowana and Polypterus species will also do as stingray tank mates.
Rays are one of the main predators in ecosystems where they dwell in the wild, and it’s not safe to keep them together with most of the other fish kinds in a tank. Their tank mates should be large enough not to become food for them, but peaceful enough as well not to bite rays or steal their food.
Thus, fish that swims in upper and medium water layers will be the best choice in this case. I’d advise avoiding armored catfishes as rays tank mates, since there are a lot of documented reports saying that they get stuck to rays and damage their skin.