Motoro or Teacup Stingrays

Video link:
http://www.youtube.com/watch?v=6hlsiktDsVI&feature=player_embedded

Introduction:
Stingrays are fascinating fish, and are quite an eye-catcher in an aquarium. However, they do have rather specific requirements. If you are seriously considering getting a stingray, please read through this article in entirety and do extra research. Please look at the warnings at the end of this article: There are some very important details in there.

Getting your fish:
Because a stingray looks nothing like any other fish, wouldn't it be hard to tell a "good" ray from a "bad" ray? The answer is no, with a little extra care.
To get this out of the way: I've heard about de-spined stingrays (the ray in the video isn't), but honestly I have no idea the repercussions of removing a stingrays spine. My guess is that the fish wouldn't be harmed if it's done correctly, but I'd be extra careful in making sure the fish wasn't harmed in the process of removing its spine. Make sure the fish store tells you very clearly if the fish has its spine or not. In the long term it won't matter (treat spined and de-spined fish in the same way), but just in case there are other complications it is good to know. Have the fish seller show you that the fish is de-spined, if it is not inherently obvious. Remember: It's their job to make sure you are choosing a fish you are confident in keeping.
Other than the whole spine/no spine deal, look for rays that have no obvious deformations. Check the eyes, gills, tail, spine, mouth, underside (this might be a little difficult, but try to do it), etc. Make sure the stingray isn't skinny: Make sure no bones or anything is prominent on the back of the fish, and that the eyes don't look like their sticking out in any odd way. A happy ray looks like the top of a pie with a tail. The ray in the video is a little skinny, but was just shipped so that's to be expected.

Buyer beware: While I am using the term "teacup" to describe this stingray, it really isn't a scientific term. Occasional fish stores can pull the slip on you, selling a fish labeled as a "teacup stingray", that could be any freshwater stingray. Make sure you know the exact species you want, how to identify it, and any stores that specifically sell that variety.

Tank setup:
Stingrays of all (freshwater) types can be kept in typical tropical freshwater tanks. Most stingrays get to good sizes, and Motoro stingrays are no exception. If you're going to keep a healthy stingray, it needs tanks over 90 gallons. Large flat tanks with lots of bottom space are preferred, though not required.
Set up your tank like an underwater sand dune-Lots of open space, no big obstructions. You can use a variety of substrate, though nothing too sharp or jagged. Please avoid using larger grain substrates, as the stingrays will have a more difficult time burying themselves in this material. The tank in this video is not designed for a stingray, due to the fact that this is a fish store.
It is possible to keep a bare-bottomed tank, but if you want to go for that "natural" look, make sure to have a decent amount of finer-grain substrate in place (more than 2" of vertical fill). Aquarium sand will make your stingray happiest-It replicates their natural environment, and allows them to bury themselves with ease. However, sand is a serious pain to clean, and absolutely cannot be used with any sort of under gravel filter (best to avoid UG filters for a happy stingray). See the warnings section for advice on heaters

Diet:
Stingrays are not picky eaters, so feed them like most other carnivorous fish. They enjoy live shrimp (not fish) very much, but make sure any live food you get is in easy reach of the ray. You can feed them big bottom feeder pellets (I'd recommend doing a little extra research to find the right brand)
Stingrays also love to eat earthworms. Make sure the earthworms you get are sanitary, and free from pesticides (NOT from your yard). Cut the worms into smaller chunks, and rinse thoroughly to get as much dirt out of them as possible. Yeah, it's a little gross, but the stingrays will appreciate your effort. Worms are very fatty, so feed them worms probably once every two weeks, one week at most.

Tank Mates:
Of course, tank mates for stingrays are an issue. Stingrays do not sting very often, but will if they are provoked by other fish. Bichirs, lungfish (I seriously recommend NOT keeping lungfish with any other types of fish), and any bottom feeder are at risk for getting skewered. Plecos appear to be fine, but I wouldn't bet on it. Best to keep tank mates to stuff that stays well out of the way of the ray.
Contrary to popular belief, rays ARE NOT monster fish. They are semi-aggressive, and while opportunistic hunters, do not go out of their way to mess around with other fish. They are not very territorial, and get along fine with each other.
I've seen cases where rays are stuck in tanks with large aggressive fish like arrowanas. Arrowanas are a serious threat to rays: I've seen pictures of rays who were completely shredded by arrowanas. Do not put any fish in the same tank as the ray that is a threat to it.
Honestly, my policy is to not put any fish in a stingray tank besides the stingray and feeders. This is the best and easiest way to go.

Warnings:
Stingrays do not have scales like fish, thus they can get injured fairly easily. Avoid putting any sort of sharp object in the aquarium. As a side note, plants are fine (be sure to take off the weight at the roots!) as long as you aren't worried about them being dug up by the rays. Stingrays can be burned quite brutally by heaters, leaving nasty scares, and possibly causing death. Therefore it is EXTREMELY IMPORTANT that you put a HEATER COVER on your heater.

Stinging:
This is probably the biggest issue that most people have with stingrays. First off, let me say that stingrays are not aggressive creatures. They will not attack you. Stinging for them is their ultimate last resort-if everything else fails.
You can keep a stingray from its birth to its death and not get stung. It's not as hard as it sounds. Treat stingrays with respect. Touching the stingray (especially near the tail) is akin to sticking your finger in snakes mouth and hoping it doesn't bite. Fish are not pets: You should never touch your fish.
If you do need to get a stingray out of your way (especially when cleaning the tank), gently waft water towards it. Don't touch the fish, just lazily move your hand towards it, then away. The stingrays should automatically avoid you. If a ray is buried, and you don't know where it is, gently waft something over the bottom. The ray should appear (I recommend doing this with the end of the vacuum, and not with your hand.)
In the event you are stung, run the injury under water (slightly warm) and call 911. There are some first aid tips you can do if you are stung, so print out a list of them on a laminated sheet, and keep it with the tank that has the ray.
To sum this all up: Keep a phone, first-aid equipment, reference sheet handy and treat the ray with respect. If you do all this odds are you will never be stung.