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Biology

The larvae of A. filiformis are found throughout the summer from July to October. A. filiformis belongs to the long-lived species with relatively fast growth in the juvenile stage followed by a much slower growing adult phase. Its life span may be up to 20 years (Mortensen, 1927; Buchanan, 1964; O'Conner et al., 1983; Gage, 1990). A. filiformis burrows about 5 cm into the substrate. The species must reach a certain size to be able to burrow down into the sediment for it must, using its serpentine arms, keep contact with the sediment surface (O'Conner et al., 1983; Gage, 1990). The arms of the brittle star have three main functions: ventilation and respiration, transport of sediment and waste materials out of the burrow, and collection and transport of food (Ockelmann & Muus, 1978). A. filiformis is a suspension feeder, collecting mixed micro-plankton, resuspended bottom material and detritus. The animals extend their arms into the surrounding water, filtering part

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© WoRMS for SMEBD

Source: World Register of Marine Species

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