Echinopora gemmacea (Hedgehog Coral) is a species of cnidarians in the family Merulinidae. Hedgehog Coral formmarine reefs. Individuals can grow to 340 µm. They are broadcast spawners.
Definition: Diameter of the egg life stage of this organism. An egg is an organic vessel in which an embryo first begins to develop. In most birds, reptiles, insects, molluscs, fish, and monotremes, it is the zygote, resulting from fertilization of the ovum, which is expelled from the body and permitted to develop outside the body until the developing embryo can survive on its own.
Definition: A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)