Walzenseestern
| Walzenseestern | ||||||||||||
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Choriaster granulatus |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Choriaster granulatus | ||||||||||||
| ( Lütken , 1869) |
The rolling starfish ( Choriaster granulatus ), sometimes simply roll star or Grained cushion Stern called, is a large starfish . It lives in the Red Sea , the Indian Ocean , and the western and southern Pacific .
features
Rolled sea stars have a thick, high-backed body and short, strong arms rounded at the front. The thick, smooth skin is brownish, red, orange, yellowish, cream-colored, or white. Short thorns and warts are only present in small, colored areas that are distinct from the rest of the body. The ends of the arms, which are round in cross section, have no thorns. The ambulatory grooves bend almost to the top at the ends of the arms. The animals usually reach a diameter of 25, a maximum of 40 centimeters.
Way of life
Rolled sea stars live on rocks, sand or coral reefs in shallow water at a depth of 5 to 40 meters. They feed on detritus , carrion, and sessile invertebrates such as sponges and coral polyps . They are probably segregated and asexual reproduction has not yet been observed. Roller stars are sometimes hosts of commensal intestinal fish (Carapidae). The partner shrimp Periclimenes soror , which is often matched in color to the starfish, is hidden under her body .
literature
- Svein A. Fossa / Alf Jacob Nilsen: Coral reef aquarium Volume 6 , Schmettkamp Verlag, 1998, ISBN 3-928819-18-6
- Hans A. Baensch / Robert A. Patzner: Mergus Sea Water Atlas Volume 3, Mergus-Verlag, Melle, ISBN 3-88244-103-8
- Helmut Schuhmacher / Johann Hinterkircher: Lower marine animals . BLV Verlagsgesellschaft 1996, ISBN 3-405-14854-5
