Although each measurement is a different individual, the mean intertwin variation is zero except for the effects of age and any variables that may contribute to delayed sampling of the second twin, such as socioeconomic status, illness, or travel.
Another characteristic is the presence of a 3-6 cm wide large pseudoscule with a transparent membrane.
Acanthaster is potentially the most important corallivore in the eastern Pacific, due to its large size and high rate of consumption (about 0.5 m” of coral tissue per month). This corallivore is especially interesting ecologically because of its preferential feeding behavior; it tends to prey on massive, encrusting and nodular coral species, often avoiding branching corals such as Pocillopora spp.
mountain ridge
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