Our coralline live rock are pieces that may have an existing light coralline coverage from Florida live rock..This is the rock I run the 40 lbs special with free shipping for $119.00 to the door.This rock is cured live rock and used mostly for foundations in reef tanks where a solid substrate may be needed. Base rock dosn’t have the shape and texture that would be found in the upper, more visable areas yet is well suited for gluing on smaller rocks that have propagated corals attached.This is one of the cheap live rocks found on the market today. We offer wholesale prices on larger volume orders. Please call for pricing. Here is a video of the average box of coralline rock.