Anus of sea star

These larvae are bilaterally symmetrical, unlike their parents illustration of a larvae of a sea star below. The anus is located on the upper surface. It has to be only on the full moon day when it comes up. Characteristics of sea stars or starfish Sea stars are characterized by radial symmetry, several arms 5 or multiplied by 5 radiating from a central body. In particular, Oreaster reticulatus , with its easily accessed habitat and conspicuous coloration, is widely collected in the Caribbean. Retrieved 12 May Habitat: Habitats could range from tropical coral reefs, kelp forests to deep-sea floor, although none of them live within the water column; all species of sea stars found are living as benthos.

This had an unintended effect on reef-feeding fish and the whole benthic community. Marine Environmental Research. This vessel has a blind end and there is no continuous circulation of the fluid within it.