I figured out the answer to this I believe. The plant that is circled is Ludwigia Repens 'Super Red'. The shorter one in front of it is Ludwigia Peruensis. I'm a newb with plants but know some of them. The super red was difficult to figure out because is different than other Ludwigias in that it's leaves are not the perfect flat elongated oval shape. They get very red and somewhat "wrinkly" and misshapen.
Like this (mine is not this red yet but getting there):
It's a great stem plant, grows SUPER fast, must faster than the Ludwigia Peruensis I have. It's more like a Rotala in growth rate.