![]() ![]() The species is found on hard surfaces, usually reef plateaus and deep reef slopes. The sponge is rough with its irregular pits and nubs covering its surface. The sponge has very elastic tubes that vary in length and can stand singly or with other tubes. The long, erect tubes taper slightly and have a wide vent up to 2.5 cm in diameter with a thin wall. The dominant morphotypes are tubular elongated and tubular vaciform. ![]() Defining Traits Ĭallyspongia aculeata usually has a tubular growth pattern, although the magnitude of the current affects its growth form. aculeata is variable, ranging from red to orange, lavender to brownish-gray, greenish-gray, and sometimes light tan. This species is frequently colonized by Parazoanthus parasiticus, a colonial anemone, and Ophiothrix suensonii, a brittle star. Poriferans are typically characterized by ostia, pores that filter out plankton, with an osculum as the opening which water leaves through, and choanocytes trap food particles.
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