An ocellate river stingray on the sand in a public aquarium

Stingray hub

Freshwater stingrays

Big, expensive and unforgettable. Species, care basics, tank size, price range and why keepers prize them.

Freshwater stingrays are among the most striking fish you can keep. Wide bodies, leopard spots or diamond dark morphs, and a calm cruise over fine sand. They are also a serious commitment: large footprint tanks, pristine water, a meaty diet and respect for the venomous barb.

Species and morphs

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Licensed aquarium photos of Motoro, Leopoldi, Hystrix and more. Tap a card to read the care notes below.

Potamotrygon motoro

Motoro

The most widely kept river ray. Bold ocelli on a sandy disc. Plan a big footprint.

Potamotrygon leopoldi

White-blotched / Leopoldi

Black ground with white blotches. The species behind many black diamond lines.

P. leopoldi morphs

Black diamond lines

Aquarium-bred dark morphs sold at a premium. Ask the seller for lineage and adult size.

Potamotrygon hystrix

Hystrix / porcupine

A smaller-staying river ray in the trade. Fine sand and meaty foods still apply.

Potamotrygon orbignyi

Smooth back river ray

Another South American Potamotrygon kept by dedicated ray keepers.

Potamotrygon spp.

River ray showpiece

Whatever the morph, the adult tank, sand bed and water quality come first.

Photos are from Wikimedia Commons and our own licensed set. Pattern and size vary by individual and morph. Always confirm the species with your seller.

Popular species and morphs

The trade centers on South American river rays in the genus Potamotrygon. The ocellate river stingray, or motoro (Potamotrygon motoro), is the most widely kept. The white-blotched river stingray (Potamotrygon leopoldi) is another prized species. Black diamond and other dark designer morphs are aquarium bred lines sold at a premium. Always ask the seller for the species or morph name, adult size and water needs before you buy.

Looking for other conversation starters? See oddballs and eels, the full Species hub, or the hobby coverage map.

An ocellate river stingray (Potamotrygon motoro) on sand

Care basics

Fine sand only

Gravel can injure the underside. Use deep, soft sand they can settle into.

Huge footprint

Rays need length and width more than tall water. Plan the adult tank before the fish arrives.

Pristine water

Strong filtration, warm tropical temperatures and frequent large water changes. They are sensitive to poor water quality.

Meaty diet

Offer shrimp, fish, earthworms and other meaty foods. Many learn to take sinking carnivore diets from tongs.

Respect the barb

The tail spine is venomous. Use tools, never bare hands, and keep a clear lid.

Legal and long lived

Check local rules before you buy. Healthy rays can live many years with the right setup.

A white-blotched river stingray (Potamotrygon leopoldi)

Tank size and price range

Hobby sources commonly point to roughly 180 gallons and up for larger adult motoros, with an even bigger footprint for the largest fish. Juveniles may start in smaller grow out tanks, but upsizing is not optional.

Expect to pay more than a typical cichlid. Common motoro juveniles often sell in the low hundreds of dollars in the US trade. Rare morphs, including black diamond lines, can run much higher. The tank, filtration and food cost more over time than the fish itself.

Why keepers prize them

Personality on the sand, bold patterns and the status of a true showpiece. They reward patient keepers who build the right tank first. Gear that helps: oversized filtration, oversized filtration, and a free tank profile when you are ready to show the setup.

Frequently asked questions

How big of a tank does a freshwater stingray need?

Footprint matters more than height. Larger motoros and similar species are commonly kept in tanks of about 180 gallons and up, with a long, wide floor of fine sand. Juveniles can start smaller, but plan for the adult from day one.

Are freshwater stingrays venomous?

Yes. They have a venomous barb on the tail. Handle with extreme care, never bare handed, and keep children and pets away from the tank during maintenance.

How much do freshwater stingrays cost?

Prices vary widely by size, locality and morph. Common motoro juveniles often sell in the low hundreds of dollars in the US hobby trade. Designer morphs, including black diamond lines, can cost several times that. Budget for the adult tank and filtration before the fish.

Can stingrays live with cichlids?

Some keepers house them with carefully chosen, similar sized fish, but many rays do best alone or with very peaceful tank mates that will not nip. Avoid aggressive diggers that will harass a ray on the sand.

Keep reading

Care notes follow published aquarium profiles and common US hobby practice. Individual rays and local water vary. Ask your seller about the specific fish you buy.

Where to go next

Oddballs and eelsFire eels, tire tracks, bichirs and more conversation starters.Species hubCichlids, community fish, breeding and every group we cover.Gear for big tanksFilters, sand and water care for footprint-heavy setups.Creators who keep oddballsFish YouTubers and channels the hobby follows.

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