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Zooplankton of the open Baltic: Extended Atlas - IOW

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Plate 5.3.34<br />

Polychaeta. 1, Harmothoe sp., young specimen, length ca. 800 µm; 2,<br />

Pygospio elegans, larvae, length 638.3 ± 55.7 µm (Postel et al., 2007).<br />

Turbellaria. 3, Alaurina composita, adult specimen, length ca. 2.5 mm. The<br />

species is among <strong>the</strong> few holoplanktonic turbellarians <strong>of</strong> <strong>the</strong> <strong>Baltic</strong> Sea; it is<br />

forming chains <strong>of</strong> individuals (zooids) and thus reproducing asexually by<br />

transverse division (fission); predators on copepods and cladocerans; one<br />

individual may eat 4 copepods per day (Larink & Wes<strong>the</strong>ide, 2006) (photos<br />

H. Sandberg).<br />

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