Happy Aquarium: Adopt a Lost Baby Axolotl (a.k.a. Wooper Looper)
The newest addition to the orphaned critters family is the Axolotl -- a neotonic mole salamander that comes from a lake in Mexico City. "Neotonic" is a fancy adjective telling us that these are salamanders that have failed to grow up into a proper salamander, so they're stuck as infantile gilled lizards. Fortunately for them, this also makes them a very popular pet in America, Britain, and Japan.
So yes, not only is this Axolotl sad because it's been abandoned by his family (according to Happy Aquarium) during a Cinco de Mayo parade, but it'll never know the visible joys of puberty. I think this thing has won the virtual pet sob story of the year, don't you?