Some FF members keep carnivorous plants in their vivariums. Bladderwort - Utricularia, has utricles; which are small bag like bladders, that are used to trap and digest prey like Daphnia and even small fish fry.
A Bladderwort utricle is the star in this year 1st place micro photograph contest sponsored by Olympus. The winning photographer, Igor Siwanowicz, magnified the bladder 100 times. He also took third place with another photo.
The below link shows an outstanding Olympus video made of the microphotographs entered:
http://www.olympusbioscapes.com/videos/OlympusShow.webm
The Olympus BioScapes Competition honors images and movies of human, plant and animal subjects as captured through light microscopes. Anyone interested in competing or learning more about the subject can get information here: Olympus BioScapes International Digital Imaging Competition. Happy Holidays !