What is the site that you do not include, and how those sites selected?
ARM developed by the NOAA in Hawaii. Basically, this is a small house for all the different species to settle in. It is about 20 cm with coating, actually opened or closed, for the species prefers open layer with many current or species such as small caves. You have all these different habitats within it. This is a great tool that is supposed to replicate samples, coarse, reefs complexity. We can use it in the sand, weed beds, in all its variety of habitats. We can process them is very easy, and we can compare the results from site to site.