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Astropecten polyacanthus, the sand sifting starfish or comb sea star, is a sea star of the family Astropectinidae. It is the most widespread species in the genus Astropecten, found throughout the Indo-Pacific region. The armspread is up to 20 cm (8 in). [2] The specific epithet "polyacanthus" comes from the Latin meaning "many thorned". [3]
A bottom dwelling animal that is actually not a true crab. Found burrowing in mud or sand flats in the wild, they need a deep sand bed in their aquarium. 60 cm (23.6 in) Sea spider [3] Pycnogonids: No: Not collected for the aquarium trade, but occasionally seen on live rock and corals as a hitchhiker. They can be pests in a reef tank, preying ...
Astropecten armatus is a dorsally flattened starfish, which grows to a diameter of about 17 cm (7 in). The disc is quite small and the five arms are slender and pointed, slightly turned up at the tips. The madreporite is very close to the edge of the disc. The central surface of both disc and arms is smooth.
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Archaster typicus is a five-limbed star with long, slightly tapering arms with pointed tips. Occasionally three, four, or even six-armed individuals occur. Adults grow to 12 to 15 centimetres (4.7 to 5.9 in) in diameter, with males often being smaller than females.
Sometimes it is used for the shallow sediment-dwelling animals that live in the deep sand bed of marine aquariums or reef aquariums such as sand sifting starfish, spaghetti worms, bristleworms and flatworms. [2] Clean-up crews have also more recently been used in freshwater aquariums to control algae, detritus and pest snails.
Sand star is a common name for several starfish (sea stars) and may refer to: Astropecten , a genus containing species known as sand stars Luidia , a genus containing species known as sand stars
Asterias amurensis, also known as the Northern Pacific seastar and Japanese common starfish, is a seastar found in shallow seas and estuaries, native to the coasts of northern China, Korea, far eastern Russia, Japan, Alaska, the Aleutian Islands and British Columbia in Canada.