Sensitive plant is known as water mimosa, is a tropical floating plant that floats and creates small yellow flowers. It is great at competing with algae for nutrients and provides your fish friends an excellent place to hide. 

Scientific Name: Neptunia aquatica
Height Grows 3-5" tall
Width May grow as long as 6'
Bloom Flowers bloom all summer long until frost
Moisture Needs Must be placed in water 
Fertilize Not required
Hardiness Zone 10 -  11
Planting Instructions: anchor to the side of a pond or place it on the surface