So I acquired some "Teacup" Stingrays a month ago, and at first they weren't very active, but as of late they are often swimming up around the surface of the tank, mainly in the areas above where my sponge filter and air wand's bubbles rise to. It honeslty looks like playing to me, but I'm new to sting rays so I'm not sure if this is normal or not. Water conditions are normal so it's not that.
