Symmetry in biology Most radially symmetric animals are symmetrical about an axis extending from the center of the oral surface, which contains the mouth to the center of the opposite, , end. Radial symmetry is especially suitable for sessile animals such as the sea anemone, floating animals such as jellyfish, and slow moving organisms such as starfish. Animals in the phyla Cnidaria and Echinodermata are radially symmetric, although many sea anemones and some corals have bilateral symmetry defined by a single structure, the siphonoglyph. Many flowers are radially symmetric or actinomorphic. Roughly identical flower parts – petals, sepals, and stamens – occur at
Subgroups of Amish affiliation as "a cluster of two or more districts with at least twenty years of shared history". They continue: "affiliated congregations share similar Ordnungs, which specify distinctive lifestyles and visible symbols that set them apart from other affiliations". When referring to affiliations Amish themselves speak of "our people" ("unser Leit") and "our way" to do things. By 2012 there were more than 40 affiliations, with smaller subgroups within some affiliations counted, there were more than 65. In addition to that, there were more than 130 fairly independent congregations. The majority of affiliations reflects mainly the different local "Ordnungen" (Orders) in