Cordylophora caspia (Pallas, 1771)

Freshwater hydroid
Cordylophora_caspia_01 Cordylophora_caspia_02

Description 1

Light brown colonial hydroid, up to 10 cm tall with filamentous colonies (with a small mossy or shrub-like appearance). The colonies are made up of polyps, which are approximately 1 mm long and white or pale pink in colour. They have the shape of a spindle when they are relaxed and are oval when they contract. They have 12 to 16 colourless tentacles that are spread out irregularly across the surface.

Biology 1

They feed on small plankton organisms. The pelagic larvae disperses with the waters currents. They can tolerate temperatures between 5-35oC and reproduce between 10-28 oC.

Habitat 1

Their distribution is associated with areas with reservoirs with low salinity and brackish lagoons. They can colonise waters with a salinity level of between 0 -35 PSU, they grow between 0.2-30 PSU and the reproduce between 0.2-2 PSU. Well developed colonies in the range of 1-2 PSU where there tidal influence is considerable, and between 2-6 PSU where the conditions are constant.

Sources 1

Spanish Catalogue of Exotic Invasive Species and Document sheets of the Exotic Invasive Species Act 630/2013 (GEIB)

Spanish Catalogue of Exotic Invasive Species - Non-arthropod invertebrates 1

http://www.mapama.gob.es/es/biodiversidad/temas/conservacion-de-especies/especies-exoticas-invasoras/ce_eei_invertebrados_na.aspx

Fuentes y Créditos

  1. Adaptado por INVASORES - administrador de un trabajo de (c) cartotragsatec, algunos derechos reservados (CC BY-SA), http://natusfera.gbif.es/guide_taxa/1968

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