Spiny starfish
A species of Spiny starfish Scientific name : Marthasterias glacialis Genus : Spiny starfish
Spiny starfish, A species of Spiny starfish
Botanical name: Marthasterias glacialis
Genus: Spiny starfish
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Description People often ask
Photo By Peter Southwood , used under CC-BY-SA-3.0 /Cropped and compressed from original 
Description
Marthasterias glacialis is a fairly large starfish with a small central disc and five slender, tapering arms. Each arm has three longitudinal rows of conical, whitish spines, usually with purple tips, each surrounded by a wreath of pedicellariae. The background colour is variable and may be brownish or greenish-grey, tinged with yellow or red and sometimes with purple at the tips of the arms. This species can grow to 70 cm (28 in) but a more usual size is 25 to 30 cm (10 to 12 in). It is sometimes confused with the northern starfish Leptasterias muelleri.
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Scientific Classification
Phylum
Echinoderms Class
Sea stars Order
Forcipulatidan sea stars Family
Asteriid sea stars Genus
Spiny starfish Species
Spiny starfish 
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