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Patiria miniata, the bat star, sea bat, webbed star, or broad-disk star, is a species of sea star (also called a starfish) in the family Asterinidae. It typically has five arms, with the center disk of the animal being much wider than the stubby arms are in length. [2] Although the bat star usually has five arms, it sometimes has as many as ...
The starfish body plan consists of five to six arms radiating from a central disk. Regenerative ability differs greatly among starfish species, but can generally be classified within three categories: unidirectional regeneration, disk-dependent bidirectional regeneration, and disk-independent bidirectional regeneration.
With its multiple arms, the starfish provides a popular metaphor for computer networks, [146] companies [147] [148] and software tools. [149] It is also the name of a seabed imaging system and company. [150] Starfish has repeatedly been chosen as a name in military history.
Coscinasterias calamaria is the largest starfish in southern Australia and New Zealand. Although called the eleven-armed sea star there can be any number of arms between seven and fourteen, but eleven is the most common number. These starfish are often found with arms of varying lengths.
Another arm opposite the lead arms then touches the substrate. [15] After this, the lead arms move towards the center of the organism and begin to move under the animal. [15] Finally, the final arm releases the substrate and the free arms flip over the sea star resulting in a somersault motion. [15]
Thromidia catalai is a large starfish with five arms and a diameter of up to 70 cm (28 in), weighing up to 6 kg (13 lb). [2] The surface is covered with low tubercles, giving it a granular appearance. The arms are robust and cylindrical, not tapering much and having rounded tips.
Coscinasterias tenuispina has from 6 to 12 arms (usually 7), often of varying lengths, and grows to 20 cm (8 in) in diameter. It is a creamy, slightly bluish colour, variously blotched with brown, and is rough textured with short spines.
Paulasterias mcclaini is a six-armed starfish with slender tapering arms. Larger specimens have a thick fleshy skin on the aboral (upper) surface, with spongy tissue underneath, which conceals the dermal plates. It is a pink starfish, covered with short spines. [4]