> [!summary]- Classification **Kingdom**:: [Animalia](Animalia.md) **Phylum**:: [Echinodermata](Echinodermata.md) **Subphylum**:: [Asterozoa](Asterozoa.md) **Superclass**:: **Class**:: Asteroidea **Subclass**:: **Superorder**:: **Order**:: Forcipulatida **Suborder**:: **Superfamily**:: **Family**:: Asteriidae **Subfamily**:: **Genus**:: Coscinasterias **Species**:: C. tenuispina **Vernacular**:: Blue spiny starfish ## Photos  *[129 - 2023-05-18 - Aventis III - Epidaurus - Greece](129%20-%202023-05-18%20-%20Aventis%20III%20-%20Epidaurus%20-%20Greece.md) - With about 8 arms, some shorters... It should have been eaten by another animal and started to regenerate its arms. It's common in that species to have a different number of arms (ususally 5). *  *[123 - 2023-05-15 - L'Aquarium I - Epidaurus - Greece](123%20-%202023-05-15%20-%20L'Aquarium%20I%20-%20Epidaurus%20-%20Greece.md) - Just some arms, but we better see the color and the spines around.* ## Notes Close to [Marthasterias glacialis - Spiny starfish](Marthasterias%20glacialis%20-%20Spiny%20starfish.md), but the difference reside in the spines rounded by pedicellaria that M. glacialis has and C. tenuispina doesn't. Also, this species often have between 6 and 10 arms, and tend to vary a lot. ## References - https://doris.ffessm.fr/Especes/Coscinasterias-tenuispina-Etoile-de-mer-epineuse-772