Guppies!

Since I got my oldest son fish recently.  My youngest son decided he wanted fish too.  He ended up getting guppies.  He got four guppies and one plecostomus (algae eater).  Today, a couple of them have protozoan parasites.  Poor things.  The one who has it the worst is the pregnant female guppy - sad.

(Photo from en.wikipedia.org)