Peculiar Star Fish Protoreaster linckii (Echinodermata: Astroidea) from Tuticorin Coastal Water, Gulf of Mannar | Juniper Publishers

Juniper Publishers- Open access journal of Oceanography and Fisheries

Starfish are a group of marine invertebrates that exist in ecosystems with sea grass, coral, rocky substratum, etc., from shallow areas to the deepest regions in the ocean. They typically have a central disc and five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Starfish have tube feet operated by hydraulic system and a mouth at the center of the oral or lower surface. The class Asteroidea is one among the various groups within the phylum Echinodermata, including nearly 1900 extant species grouped into 36 families, and approximately 370 extant genera. Asteroids occur at all depths from the intertidal to the abyssal and are present throughout all over the world’s oceans, but are most diverse in the tropical Atlantic and Indo-Pacific regions.
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