Oh, that to me is a pothos houseplant. It can be grown with the roots in the water & the leaves out. Some people grow it out the back of tanks for both looks & to help with tank nitrate level. But it does need "some" light from a window or raised tank lighting.
I actually was given a cutting recently but I don't know if my tanks get enough light. The roots can grow long but you can prune them to some extent.