Motoro Stingray - 5 inch

The Motoro Stingray, also called Potamotrygon motoro or the ocellated river stingray, is one of the most eye-catching freshwater rays available in the aquarium hobby. A 5 inch specimen already shows the classic disc shape and attractive spotted pattern that makes this species a standout choice for serious keepers building a South American monster fish setup.

This is not a community fish for small tanks. Motoro Stingrays need excellent water quality, open bottom space, soft substrate, and careful tank mate selection. They are best kept by advanced aquarists who understand the needs of large predatory freshwater fish and are prepared for the ray's long-term size and feeding demands.

Key Features

• Appearance: Flattened round disc body with a long tail and attractive ocellated spots that give the fish its popular name.
• Size: This listing is for an approximately 5 inch juvenile specimen; adults grow far larger and require long-term planning.
• Colors: Brown to tan base tones with orange, yellow, or cream ringed spots depending on the individual specimen.
• Lifespan: With proper care, stable water, and a suitable diet, Motoro Stingrays can live for many years in captivity.
• Temperament: Predatory but generally calm when housed correctly; not suitable with tiny fish, fin nippers, or aggressive bottom dwellers.
• Water Type: Freshwater species suited to warm, clean, well-filtered aquariums.

Care Requirements

• Tank Size: Juveniles need a spacious tank with a large footprint, and adults require very large custom or monster fish aquariums with plenty of open floor area.
• Water Parameters: Ideal temperature is 24-28°C with pH around 6.2-7.5. Stable parameters and very low ammonia and nitrite are essential.
• Substrate: Fine sand or a very smooth bare-bottom style is preferred to protect the soft underside from abrasions.
• Diet: Feed quality meaty foods such as earthworms, chopped prawn, mussel, and other clean protein-rich ray-safe foods. Avoid relying on feeder fish.
• Tank Mates: Best with large, non-aggressive fish that will not harass the ray. Avoid sharp decor, territorial bottom fish, and species small enough to be eaten.
• Filtration: Strong biological filtration and regular water changes are important because rays are sensitive to deteriorating water quality.
• Care Tips: Acclimate slowly, keep the tank escape-proof, avoid copper-based treatments unless confirmed safe, and monitor feeding response closely after arrival.

Motoro Stingrays are premium livestock for experienced aquarists who want a true centerpiece fish. When given clean warm water, a safe bottom surface, and a large mature aquarium, they develop into impressive display animals with bold patterning and graceful movement.