Live rock is rock from the ocean that has been introduced into a saltwater aquarium. Along with live sand, it confers to the closed marine system multiple benefits desired by the saltwater aquarium hobbyist. The name sometimes leads to misunderstandings, as the "live rock" itself is not actually alive, but is made simply from the aragonite skeletons of long dead corals, or other calcareous organisms, which in the ocean form the majority of coral reefs. When taken from the ocean it is usually encrusted with coralline algae and inhabited by a multitude of marine organisms. The many forms of micro and macroscopic marine life that live on and inside of the rock, which acts as an ideal habitat, give it the name "live rock".
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Famous quotes containing the words live and/or rock:
“To live and die amongst foreigners may seem less absurd than to live persecuted or tortured by one’s fellow countrymen.... But to emigrate is always to dismantle the centre of the world, and so to move into a lost, disoriented one of fragments.”
—John Berger (b. 1926)
“each rock a word
a creek-washed stone
Granite: ingrained
with torment of fire and weight”
—Gary Snyder (b. 1930)