One of our fish, Jose, has been laying on his side for the past two days and seems swim with a noticeable limp. I don't know what happened, but this is a recent development. I moved him out of his enclosure (a multi-gallon fish bowl) to a small very clean enclosure for the night. I know he goes under his rocks in the bowl, but don't know what caused this. Any ideas on what to do?
He lays in a "corner" and just sits there
He swims favoring one side
Doesn't really move a lot
Please help I don't want to have to explain to a 3 year old what happened to the fishy after the near death of Squishy 2 months ago (moving in 11 degree weather isn't good).