|This article may need to be rewritten entirely to comply with
Wikipedia's quality standards. (May 2013)| ||This article may be
too long to read and navigate comfortably. (December 2011)| ||It
has been suggested that this article be split into multiple
articles. (Discuss) Proposed since December 2012.| The largest
organisms found on Earth can be determined according to various
aspects of organism size, such as: mass, volume, area, length,
height, or even genome size. Some organisms group together to
form a superorganism, but such are not classed as single large
organisms. The Great Barrier Reef is the world's largest
structure composed of living entities, stretching 2,000 km, but
contains many organisms of many species. The organism sizes
listed are frequently considered "outsized" and are not in the
normal size range for the respective species. - The conifer
division of plants include the tallest organism, and the largest
single-stemmed plants by wood volume, wood mass, and main stem
circumference. The large