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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]
The sea stars are considered “functionally extinct” in California and Oregon.
Labidiaster annulatus is found around the Antarctic Peninsula, South Georgia and the South Sandwich Islands.The depth range is from the intertidal zone down to 554 metres (1,818 ft) but this starfish most commonly occurs between 30 and 400 metres (98 and 1,312 ft).
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 ...
Sunstar (photography), an optical phenomenon found on photos of bright objects taken with a small aperture; Sunstar (racehorse), a British racehorse; Ornithogalum dubium, a flowering plant; Sunflower starfish (Pycnopodia helianthoides), also known as the sun star or sunflower star
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Creatures like jellyfish, starfish and sand dollars rely on the wind and current to move around. If an offshore storm or strong winds push these invertebrates too close to shore, they can get ...
A Sunflower Starfish (Pycnopodia helianthoides) undergoes regeneration after losing numerous arms. The early regenerative phase is marked by a large mobilization of various cytotypes from different locations (like the coelomic cavities) towards the edematous regenerating region. [21]