Potamotrygon Motoro – Freshwater Stingray Video & Care Sheet – Feeding – Tank Setup

This is a video showing our 150 gallon Potamotrygon Motoro (Freshwater Motoro Stringray) aquarium. I talk about all the specifics of the setup and also feed him some raw shrimp. This video will give you an idea of how to keep Freshwater Stingrays, if you are interested in doing so. Our Motoro Stingray is approximately 10″ disk size and 16-18″ long or so. The main diet is the shrimp shown in the video but he also eats small fish and worms, when it rains hard I gather the worms from my yard. I do not use pesticides though, if you do, you should probably not feed your fish the worms from your yard. If you watch the video all the way there is some bonus underwater footage near the end. The camera I used is an Olympus Waterproof Stylus Tough.

The Potamotrygon Motoro Stingray comes from South America, specifically the Orinoco, Parana, Uruguay and Amazon river systems. They live life primarily on the bottom, searching for food in the substrate. They eat mostly crustaceans as well as small fish. They can reach up to 3′ long and around 30lbs! Truly a River Monster at that size.

It is one of the most interesting fish to keep, but also very challenging. They can sting you and cause a great deal of pain, as well as a trip to your local hospital. So you must exercise extreme caution when working in the tank. They also require extremely clean water, so you must do big water changes often. They will not tolerate high levels of Nitrate, so unless you keep a ton of live plants in your aquarium there is no way around it. You must do water changes to keep your Stingray healthy.

——————————————– Motoro Ray Profile / Care Sheet ———————————————–

Scientific Name – Potamotrygon Motoro

Common Name – Motoro Singray, Ocellate River Stingray, Ocellated Stingray

Regions of Origin – South America – Amazon River Basins (Uruguay, Orinoco, Parana)

Temperament – These guys are 100% predators but peaceful most of the time. You’ll want a species only tank or to keep them with perhaps some surface predators, such as Silver Arowana. Even if they can’t eat a fish, they will try. Make sure any Arowana you attempt to keep are large enough to not become a snack.

Maximum Size – Up to 3′ in the wild, although rarely seen. Most specimens in captivity are smaller, rarely making it over the 2′ mark.

Diet – Smaller Fish, Worms, Shrimp, Crustaceans

Water – 78-84 degrees, Stable PH is VERY important (6.0 preferred but as long as it is stable, higher PH can be tolerated.)

Potamotrygon Motoro – Motoro Singray – Ocellate River Stingray – Ocellated Stingray


  • Hezekiah says:

    how much stingrays ( motoro) would fit permanently in a 10ft x 24ft x 24ft glass aquarium?

  • Jordan says:

    Hi I have a tank set up cycling and was just wondering of I should get a fish first and then my stingray or if its ok to just buy the string ray then add fish I’m doing fresh water any advice would be great thanks

    • TankTerrors says:

      I would let the tank run for a few months before adding them if possible. You want the tank fully cycled along with a large colony of beneficial bacteria built up in a perfect world, the more stable the better for a Ray. Also a Ray will eat most smaller fish, so make sure whatever you are adding is far to large to eat or it’s possible they will end up being an expensive snack.

  • christian says:

    do you think it would be alright to keep a couple motoros in a 48″X48″X24″ 240 gallon tank?

    • TankTerrors says:

      Sure, that is a great footprint. They may eventually out grow it if they become massive Motoros but that would take a long time.

  • jord says:

    Could u put 1 in a 75 gallon tank because there’s a baby monoro at my local pet store

  • Ben says:

    Hi I have a 150 gallon tank could I house a 4 inch motoro in there and for how long? Thanks, Ben

    • TankTerrors says:

      It depends on the footprint of the tank, if it’s a 4′ x 2′ then until he is about 18″ long or so max, if it is a 6′ x 1.5′ then slightly smaller because it limits turn around room. You want the depth of the tank to be a couple inches more than the total length of the Ray, so it can turn around easily.

  • dan says:

    Could i keep a Potamotrygon Motoro stingray in 60 X 24 X 24 inches.

    • TankTerrors says:

      You could for a while but not for life, they will eventually need a larger tank as they reach adult size. That is a good size tank, so it will be a little while before it outgrows it since I assume you are buying a baby to start with.

  • dan says:

    Will a 72 X 24 X 24 aquarium work or a 96 X 24 X 24 aquarium. I asked these questions because i want to buy a aquarium which will house it when it grows up.

    • TankTerrors says:

      96″ length would be good but you’ll need double the depth to house it comfortably for life. Something like 96″L x 48″D x 30″T would be great but bigger is ALWAYS better. They can reach very large sizes so if the tank is only 24″ deep (meaning front to back) then it cannot turn around as an adult without hitting the walls.

  • ryan says:

    hey i have a question, i just purchased a motoro pup 2 inchs wide. it is very small however as of right now i have it placed in my grow out tank that is a 35 gallon with a 75 gallon filter. it filters 400 gallons a hour with two fluval ammonia remover bags and two canisters of fluval biomax as well as one carbon canister. what im curious about is if he or she is safe in this tank until it gets a bit bigger to be moved to my 75 gallon with two 75 gallon filters attached to it before i purchase a new 200 or 240 gallon tank with that insanely good fluval filtration system they offer. the only reason its not in the 75 is due to the fact that i have a 15 inch spotted gay and a 12 inch Florida gar in there and just don’t want to take the risk. any response is appreciated. also i might add that i check the water every three days and before i put him in ammonia was 0 nitrite was 0 i believe and nitrate was low as well. hardness was 0 ph was 7 and i forgot the rest if i forgot any.

    thank you

    • TankTerrors says:

      It sounds like you are taking all the proper steps. The 35 gallon will be fine as long as you keep the water in check, just move him once he can go into your larger tank. In the mean time if you keep the water clean and in check, you shouldn’t have an issue. Once the ray is as long it the tank is deep (front to back) you’ll want to consider moving it. Good luck.

      • ryan says:

        thank you for the response it is greatly appreaciated. he wont be in there for long maybe two months or even a month. need time to set up the 240 gallon tank. i will be sure to be keeping a close eye on him.

        Thank You

        • TankTerrors says:

          Oh that is a very short time, if that is all it is you should be just fine. Be careful when moving him though – the barb can really do some damage.

  • Jimmy oh says:

    Hi.. My fish tank design are sump tank.. What is the best design filter system for the ray.. Put which kind of bio in is the best..

    • TankTerrors says:

      A live planted sump would be ideal. One with a small light and plants growing – this will actively remove nitrates.

  • Hi, I wanted to build a hatchery to take care stingray for commercial purposes. But I wonder how much it would cost me the the prices of Stingray in the market.

    Steve Thailand

  • Anthony says:

    I have a 125 long I wanted to house 2 montoro sting rays any would you think it would be a problem just to let you know I go over kill on filtration

  • Kaustav Ghosh says:

    I have a 6ft L x 2.5ft W x 1.5ft H tank. Can I house one motoro ray in this tank permanently?

    • TankTerrors says:

      It is pretty big, if you kept up with water changes it would be ok. A bit wider and longer would be ideal but that is still good. Once many years went by it would probably get a bit uncomfortable but that would take many years if not a decade plus to reach that large.

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