Wikipedia
Swollen bladderwort
Utricularia inflata

Swollen bladderwort (Utricularia inflata) is an invasive plant. It was first detected in Washington in 2003.

U. inflata is a large suspended aquatic plant that forms dense mats and degrades natural habitiats. It is one of the few carnivorous plants that can be invasive.
Summaries of State Plant Protection Laws and Regulations
Washington