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Mediaster aequalis

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Mediaster aequalis , Begg Rock Santa Barbara Island, California, 2011

Uploaded by Muelly.
Courtesy of the author Chris Grossman, USA (copyright: @Chris Grossman, diver.net) Image detail


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lexID:
11923 
AphiaID:
242160 
Scientific:
Mediaster aequalis 
German:
Seestern 
English:
Sea Star 
Category:
Etoiles de mer 
Family tree:
Animalia (Kingdom) > Echinodermata (Phylum) > Asteroidea (Class) > Valvatida (Order) > Goniasteridae (Family) > Mediaster (Genus) > aequalis (Species) 
Initial determination:
Stimpson, 1857 
Occurrence:
Alaska, Canada, golfe de Californie, Pacifique Ouest, USA 
Sea depth:
1 - 500 Meter 
Size:
bis zu 20cm 
Food:
Zoobenthos, Sea squirts, Sponges, Predatory, Bryozoans (sea mats), Detritus, omnivore, Carrion, arénicole 
Difficulty:
There are no reports available yet that this animal has already been kept in captivity successfully 
Offspring:
None 
Toxicity:
Toxic hazard unknown 
Red List:
Not evaluated (NE) 
Related species at
Catalog of Life
:
  • Mediaster arcuatus
  • Mediaster australiensis
  • Mediaster bairdi
  • Mediaster boardmani
  • Mediaster brachiatus
  • Mediaster capensis
  • Mediaster dawsoni
  • Mediaster gartrelli
  • Mediaster murrayi
 
Author:
Publisher:
Meerwasser-Lexikon.de
Created:
Last edit:
2019-01-24 13:09:18 

Husbandry

Mediaster aequalis Stimpson, 1857

Mediaster aequalis has five stumpy arms, occasionally four or six. This species grows to a diameter of up to 20 cm. The upper surface is bright red while the under surface is an orangey-red coloured. The tube feet are red.

Mediaster aequalis is omnivore,a predator and will scavenge for dead animals and detritus. As well as feeding on algae, it preys on tunicates, sea pens, sponges, bryozoans, brachiopods and polychaete worms. In its turn it is hunted by the larger morning sun star.

Similiar to Pteraster tesselatus, Dermasterias imbricata, and Patiria miniata.They have similar shapes but do not have the large marginal plates.

Synonymised names:
Ophidiaster aequalis Dujardin & Hupe, 1862

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