In Singapore, Archaster typicus has been recorded from Chek Jawa, Cyrene Reef, Kusu Island, Lazarus Island, Pulau Hantu, Pulau Semakau, Pulau Senang, . Juveniles are found in prop roots of mangroves and gradually inhabit sandy shores, seagrass areas and shoals as they age, where they are buried slightly in the. Reference for: Archaster typicus. Other Source(s). Source: WoRMS – World Asteroidea Database, database (version undefined). Acquired: Notes: Mah .
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The white structure is the madreporite. Pseudocopulation in Sand Stars!
Distribution in Singapore on this wildsingapore flickr map. Retrieved from ” https: Their method of mating is unique among sea stars They use water to pump up their bodies. World Register of Marine Species.
Kusu Island, Feb The Asteroid fauna Echinodermata of Singapore with a distribution table and illustrated identification to the species. Echinoderms of the Philippines: The Singapore Science Centre, Singapore.
Chek Jawa, Jan Archaster typicus is a detritivore and eats detritus and anything else edible it comes across.
WoRMS – World Register of Marine Species – Archaster typicus Müller & Troschel,
Chek Jawa, Feb 02 This pair of sea stars are in ‘mating’ position. Archasteg in the Philippines”. The spines, arranged in a marginal fringe, are short, flat and blunter than A. Mating behaviour and reproductive cycle of Archaster typicus Echinodermata: The body is slightly inflated and there is a whitish madreporite near the centre of the disc.
Threatened plants and animals of Singapore. It usually inhabits areas of the seabed with soft sediments including sand, silt and seagrass meadows. Want to share your sightings? Tanah Merah, Oct Various colours and patterns, sometimes four or six arms Chek Jawa, Dec 03 The greenish stomach sticks out through the mouth to ‘mop up’ edible bits on the ground.
To feed, it everts its stomach through its mouth which is situated centrally on its underside. Parasitic snail on arm, not often seen. Filmed on Cyrene Reef,with a glimpse of how the sea star moves with its tube feet! The food item is engulfed and brought inside the starfish when its stomach is returned to its normal position.
Invertebrate Reproduction and Development. Marine Biology SeptemberVolume 99, Issue 2, pp Archasteridae Animals described in Cryene Reef, Jul It is found in shallow waters in the Indo-Pacific region. Marine Biology MarchVolumeIssue 3, pp Archaster typicus is a five-limbed star with long, slightly tapering arms with pointed tips.
It is commonly known as the sand star or the sand sifting star but these names are also applied to starfish in the genus Astropecten. A guide to common shallow water sea stars, brittle stars, sea urchins, sea cucumbers and feather stars.
This starfish is adapted to life on the sandy seabed, where it buries in the sediment during high tides and moves over the sediment surface during low tides. Common sea stars on Singapore shores. Common sea star Archaster typicus Family Archasteridae updated Oct if you learn only 3 things about them Archaster typicus is a species of starfish in the family Archasteridae. Small male on top of larger female.
The underside is pale. Filmed on Cyrene Reef, Jul 08, showing the sea star ‘breathing’ through the madreporite, and a tiny parasitic snail on it.
Chek Jawa, Nov 04 Arms can become flexible to turn themselves over if accidentally flipped.
A starfish can tell whether another is male or female, probably by chemotactic recognition. The female can move about and feed but the male is more restricted in his activities. The Singapore Red Data Book: Chek Jawa, Mar