Water Bears: world's toughest animal
Bill Gurstelle has fond things to say about tartigrades (AKA water bears), which are tiny invertebrates. I guess they look more like bears than Sea Monkey's look like monkeys.
Now here's the thing I really like about tartigrades. They are apparently the World's Toughest Animal. You can shoot them into space, take them to the deepest ocean depths and let them go, deprive them of air, water, and food for years and they don't care. Send them into the core of nuclear reactor. They'll be fine.
I find myself HYPNOTIZED by this video here here: