Actually....most stingray keeps use the term 'teacup ray' to describe any young ray, so there's no telling exactly what kind Surprised is going to be surprised with. Most freshwater rays belong to the genus
Potamotrygon. There are some people who refer to the Reticulated Stingray,
Potamotrygon reticulata as the 'Teacup Ray' so that may be what Surprised gets.
Another thing I forgot to mention in the post above....and this is IMPORTANT!!!
The spines of the freshwater stingrays are
just as poisonous as those on their saltwater cousins...and in some cases even worse. These are NOT fish to be trifled with! In areas where freshwater stingrays are common they are MUCH more feared than piranhas or poisonous snakes. Some of the symptoms associated with freshwater stingray envenomation include: severe (!!!) local pain and swelling, heavy bleeding from the site of the wound, nausea and vomiting, diarrhea, heavy perspiration, generalized muscle cramps, uncontrolled muscle twitching, abdominal pain, seizures, sudden drop in blood pressure and (on occasion) paralysis.
Should you ever be stung by one of these fish...a commonly used (and effective) first aid treatment is to immerse the affected limb in hot water...as hot as the patient can stand but not hot enough to cause burns... or apply a heat pack directly to the site of the sting. This is supposed to give fairly rapid relief from the major pain and may help to denature some of the venom. Medical treatment is essential, even without the more severe symptoms. Infection at the site of the sting is not common, but if it does occur it has a tendency to be quite bad.
A site that has some nice pictures and pretty good descriptions of these rays can be found at:
http://www.tcp-ip.or.jp/~y-miura/fws/Esyurui.html