I cant remember its name, its not a suitable aquariums plant, i think its a marsh/wet land plant, it will die back after a months or so and pollute the water.
this is used as a teranium plant but loads of plant sellers sell this (as well as a few others) as true aquatic plants ( stay away from dracenas, Stardust ivys, violet/purple ivys etc)
this plant is chlorophytum bechetii or wheat plant or white ribbon. a good rule is that if it looks like a house plant it usually is
it may also be a dracena sanderiana they are very similar in look, both are non aquatic adbn at best can be used in teraniums