Starfish
Query URLs
https://term.museum-digital.de/md-de/tag/5242
- Note
- "Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea. Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as Asteroids due to being in the class Asteroidea. About 1,500 species of starfish occur on the seabed in all the world´s oceans, from the tropics to frigid polar waters. They are found from the intertidal zone down to abyssal depths, 6,000 m (20,000 ft) below the surface.
Starfish are marine invertebrates. They typically have a central disc and usually five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey or brown. Starfish have tube feet operated by a hydraulic system and a mouth at the centre of the oral or lower surface. They are opportunistic feeders and are mostly predators on benthic invertebrates. Several species have specialized feeding behaviours including eversion of their stomachs and suspension feeding. They have complex life cycles and can reproduce both sexually and asexually. Most can regenerate damaged parts or lost arms and they can shed arms as a means of defense. The Asteroidea occupy several significant ecological roles. Starfish, such as the ochre sea star (Pisaster ochraceus) and the reef sea star (Stichaster australis), have become widely known as examples of the keystone species concept in ecology. The tropical crown-of-thorns starfish (Acanthaster planci) is a voracious predator of coral throughout the Indo-Pacific region, and the northern Pacific sea star is considered to be one of the world´s 100 worst invasive species." - (en.wikipedia.org 23.07.2021)
-
Seestern - Urasterella asperula
Seestern (Urasterella...
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA -
Seestern - Medusaster rhenanus
Der 15-armige Seestern...
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA -
Seestern Goniaster becksi
Dies ist das Typusexemplar...
Object information
Image: Geomuseum der WWU Münster - CC BY-NC-SA -
Einteiliger Badeanzug mit Kordel für Damen
Badeanzug in den Farben blau,...
Object information
Image: Hamaland-Museum Kreismuseum Borken - CC BY-NC-SA -
Schachfiguren als Seetiere
Fast 20 Jahre bestimmte der...
Object information
Image: GRASSI Museum für Angewandte Kunst - CC BY-NC-SA
References
Synonyms
[]