plant life

These are sturdy, slow-growing sprouts that kind of look like leeks. What are these strange sprouts? Thanks for any help.

I am new to the hobby and I feel I was lucky and got some live rock with plants on what is the best for my rock with plants on it away from current and closer to light or close to current and away from light? I have 50lbs of rock in my 29Gallon tank and feel there isn't much room else in...