That's Rotala "green" - true id disputed but thought to be variety of Rotala indica (which is normally red).... unlike indica, which grows straight up until it hits the surface, Rotala green has a very strong tendency to branch out and grow laterally even at mid-or low levels, as long as the light is sufficient (2.5 wpg or more).... and will form very lush turfs.
In the second picture, it looks like Rotala green as well, with some R wallichi at the back..... Amano blasts the lights (probably MH) and CO2 (with adequate fert), so they easily become so thick and lush..... some pruning to shape the plants is needed too..... A similar, but smaller and finer leafed plant is Rotala "Nanjenshan" from Taiwan
What I like about these aquascape examples is the powerful effect of using just 2-3 species amassed in large clumps.... it's actually more "natural" too, as this is what you will find in actual habitats.
A similar, but smaller and finer leafed plant is Rotala "Nanjenshan" from Taiwan.
Bookmarks