Look at the beauty of this: the carnivorous Common Bladderwort. It lives in nutrient poor environments, so supplements its needs by trapping living organisms. Those little black "bladders" (they're bright green when young) ingest tiny critters with a suction motion when triggered. I love seeing them in the lake - their 'leaves' are like delicate threads, and its iridescent green color glows in the underwater light. It reminds me of a fine, filigreed piece of jewelry.