Aldrovanda vesiculosa is a bladderwort and makes a nice floating plant for the experienced hobbyists, can multiply quite rapidly in a suitable environment.
Soft water is very important, (Low KH/3 or less & GH/5 or less)
Lighting needs to be within the 2.5~3wpg range.
CO2 injection is an absolute necessity.
Fertilization should be diligent, NPK, TE and Fe.
It needs to be in a tank that is clean and stable w/good flow, it does not do well in an algae prone tank since it is a floater and closest to the lighting.
It is a member of the Droseraceae family or sundew.