The video above was done by Victor Rakou in the week of June1 2000. We have assembled here various segments of video to illustrate the community of organisms which live on and around Lithothamnion in the subtidal area at about 5 to 8 meters off the North side of Great Race Rocks, just out from the docks. In some areas large rock surfaces are completely covered with this encrusting red algae. Due to the high calcium carbonate content of it's thamnion, it can only be grazed by molluscs such as lined chitons with very hard rasping radulas. See also the blue waved chiton pictures where you can see photos of Lithothamnion lining the vertical sides of some of the lower level tidepools near peg 6. It also thrives in the tidepools east of the docks (peg 14b)

See also this Lithothamnion link to the digital herbarium.