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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.
Sunflower seastar regenerating missing arms. Some species of starfish have the ability to regenerate lost arms and can regrow an entire new limb given time. [48] A few can regrow a complete new disc from a single arm, while others need at least part of the central disc to be attached to the detached part. [22]
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]
Meanwhile, a disease known as sea star wasting syndrome has wiped out 90 per cent of sunflower starfish since 2013, leaving the urchins to graze the kelp unchecked.
Pteraster tesselatus, the slime star or cushion star, is a species of starfish in the family Pterasteridae found in the North Pacific. ... or the sunflower star ...
A starfish has five identical arms with a layer of “tube feet” beneath them that can help the marine creature move along the seafloor, causing naturalists to puzzle over whether sea stars have ...
Sea star wasting disease or starfish wasting syndrome is a disease of starfish and several other echinoderms that appears sporadically, causing mass mortality of those affected. [1] There are approximately 40 species of sea stars that have been affected by this disease.
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