The Starfish of Hong Kong, Part 4

Eight-armed Luidia sea star (Luidia maculata)

Luidia maculata (Seven armed starfish) taken in Ras Sedr,Egypt in 2012 by لا روسا (cc-by-sa 4.0).

The diameter with arms is 12 – 20cm and it has  5 – 9, but normally 8 arms. The arms are long, rounded and tapered to a sharp tip. The tips bear small sharp spines on the sides. The underside is pale and the grooves along the arms bear large tube feet with club-like, pointy tips. The colours and patterns on the top side are variable from greyish blue, to brown and beige, but normally have a darker star-shaped pattern in the middle, and dark irregular bars running along the arms. It ranges from SE Arabian Sea, Persian Gulf, Maldive area, Ceylon, Bay of Bengal, East Indies, north Australia, Philippine, China and south Japan. Occurs inshore at depth from 0-134 m. Observations in Hong Kong include near Kau Sai Chai in Sai Kung and near Port island. It burrows in soft sediments and eats small invertebrates including other starfish.

Astropecten monacanthus

image directly linked from the website: Echinoderms of the Gulf of Eilat (Aqaba)

Distributed in SE Arabia, Maldive area, Ceylon, Bay of Bengal, East Indies, norh Australia, Philippine, China and south Japan. Lives inshore in tropical, Indo-west Pacific Ocean waters at depths from 0 – 50 m. Observed in Hong Kong from Tai Long Sai Wan, in sand substrate.

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hkmarinelife

My PhD was about Antarctic deep-sea ecology and biodiversity, but I am passionate about southern China’s rich marine (and terrestrial) environments. This blog is a collection of facts, news and articles about Hong Kong's diverse marine environment.

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