Nice pleco!
I've heard lots of names for it.. Lemon pleco, green spotted pleco, avocado pleco..
But when it comes right down to its.. Its call L-200 Green Phantom... it also has a cousin L-128 Blue Phantom, looks exactly alike, but very dark/azul blue..
They will eat any veggie.. algae wafers, even potatoes.... all u need is something to weight the veggies down... Try using a fork.. or what i like to use.. Turkey pins, stuff u would use to put stuffings in and close the turkey up for baking.. I find that the best.... I usually tie it to a wire so its like a chain.
Best of luck!