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Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (/ ˌ æ s t ə ˈ r ɔɪ d i ə /). 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.
Xantus, 1860 [1] Heliaster kubiniji is a species of starfish in the order Forcipulatida . It is commonly known as the gulf sun star , the common sun star or estrella de mar de golfo and it occurs in the intertidal zone of the Pacific coast of California, Mexico and Nicaragua.
Like other starfish in the family Asteriidae, Marthasterias glacialis is a predator and feeds mostly on bivalve molluscs and other invertebrates. [6] It has been found that secondary metabolites known as saponins , found within the starfish's tissues, have a dramatic effect on the whelk Buccinum undatum .
If attacked by a predator such as the morning sun star (Solaster dawsoni) or the sunflower star (Pycnopodia helianthoides), the slime star emits great quantities of repellent mucus and can often evade the predator. [3] The mucus is toxic and has been shown to kill other invertebrates immersed in it. [3]
Many of the genera in this family exhibit brilliant colors and patterns, which sometimes can be attributed to aposematism and crypsis to protect themselves from predators. Some ophidiasterids possess remarkable powers of regeneration, enabling them to either reproduce asexually or to survive serious damage made by predators or forces of nature ...
Brisingidae contains the following genera and species: [1] Astrolirus Fisher, 1917. Astrolirus panamensis (Ludwig, 1905) Astrolirus patricki Zhang, Zhou, Xiao & Wang, 2020; Astrostephane Fisher, 1917. Astrostephane acanthogenys (Fisher, 1916) Astrostephane moluccana (Fisher, 1916) Brisinga Asbjørnsen, 1856. Brisinga alberti Fisher, 1907 ...
Sladen, 1889 [1] Solaster paxillatus , the orange sun star , is a species of starfish found at varying depths in the northern Pacific Ocean. It is a natural predator of the starfish Asterias amurensis .
Luidia maculata is a species of starfish in the family Luidiidae in the order Paxillosida.It is native to the Indo-Pacific region. [2] It is commonly known as the eight-armed sea star because, although the number of arms varies from five to nine, eight arms seems to be the most common.