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Underside of a sunflower sea star. Sunflower sea stars can reach an arm span of 1 m (3.3 ft). They are the heaviest known sea star, weighing about 5 kg. [4] They are the second-biggest sea star in the world, second only to the little known deep water Midgardia xandaros, whose arm span is 134 cm (53 in) and whose body is 2.6 cm (roughly 1 inch) wide. [7]
A baby sunflower sea star at the Aquarium of the Pacific's behind-the-scenes lab. ... Beyond prioritizing plants and animals, the report card also is intended to be a practical resource for the ...
The sea stars are considered “functionally extinct” in California and Oregon.
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 ...
Within the urchin barrens, group of starfishes, sand dollars, and brittle stars scavenge across the barrens while facing against their fierce predator, Sunflower sea star. In Southern Africa , as chokka squid are preyed on by short-tail stingray and sand tiger shark , the Cape fur seals that share the waters are hunted by the world's largest ...
The comatulid Florometra serratissima, in the north east Pacific, has been reported as being preyed on by the graceful decorator crab [7] Oregonia gracilis and the sunflower seastar Pycnopodia helianthoides. The loss of the arms may be due to autotomy, the shedding of an arm to save the rest of the organism. A 20 centimetres (7.9 in) arm was ...
The common starfish, common sea star or sugar starfish (Asterias rubens) is the most common and familiar starfish in the north-east Atlantic. Belonging to the family Asteriidae, it has five arms and usually grows to between 10–30 cm across, although larger specimens (up to 52 cm across) are known. The common starfish is usually orange or ...
Solaster stimpsoni is a large species, growing up to 50 cm in diameter. It can have 8 to 12 arms, but usually has 10. [2] The aboral surface has a distinctive reddish orange colour and is covered with thick paxillae.