Cuuute!! And crafty!

Larvae of this sand dollar split to make two smaller larvae when threatened by a predator. The authors think the two new "sand dimes" aren't as likely to be seen by predators, suggesting that this "rapid size reduction" is used "as a defense."

Regular size on left, new and improved size on right...



An article:

http://www.newscientist.com/article/dn13460-creature-clones-itself-to-avoid-becoming-fish-food.html