We have a small tank with a few sea monkeys (Artemia brine shrimp) in it that we can't keep because we're taking in a friend's cat soon.
The tank has been going for about ten months and currently has two adult sea monkeys and three or four babies.
We're hoping to re-home them to a hobbyist who might want to add them to their tank, or keep this tank separate (will come with all our supplies and food).
Sea monkeys are very easy to take care of and are also a great "beginner" pet.