jz1799. very low tide reveals algaes, mussels, and barnacles (top to bottom). This illustrates the topic of Intertidal Zonation- distinct bands or layers of life, segregated by the individual specie's tolerances to dessication (drying out). Rockweed Algaes are highest in the picture, meaning they can remain out of water longer than the mussels (black middle layer), and the barnacles (lower tan colored band).  Oregon coast, Pacific Ocean, USA...Brandon Cole.MARINE PHOTOGRAPHY.4917 N. Boeing Rd..Spokane Valley, WA  99206  USA.tel: 509-535-3489.e-mail: brandoncole@msn.com.web: www.brandoncole.com.