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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]
The sand star has a small disc and five long, flattened arms with tapering tips. It can grow to a diameter of 40 cm (16 in), and is a grey, greenish-grey, or pale brown colour, sometimes speckled with white. The arms have rows of large marginal plates, each with several spines, but these are not visible from the aboral (upper) side.
These sea stars are similar one to each other and it can be difficult to determine with certainty the species only from a photograph. To have a certain determination, in some cases, animals should be analyzed in the laboratory or using genetic testing, but often it isn’t possible. In order to determine the species, with a reasonable margin of ...
Together, the data created a 3D map to determine where genes were expressed as sea stars developed and grew. The team was able to determine the genes that control the development of the starfish ...
Pompano may also refer to various other, similarly shaped members of the Carangidae, or the order Perciformes. Their appearance is of deep-bodied fishes, exhibiting strong lateral compression, with a rounded face and pronounced curve to the anterior portion of their dorsal profile.
Naples, Florida has a starfish problem -- but not the kind you're used to seeing.This isn't your average Patrick Starfish! These sea creatures are known as 9-armed sea stars, and thy look a bit ...
This species lives in the Atlantic Ocean and in the Mediterranean, but the two populations show differences in superomarginal plates.In particular, the specimens of the Mediterranean have superomarginal plates devoid of spines (they are considered by some author as the subspecies Astropecten irregularis pentacanthus) while Atlantic populations are provided with one spine for each ...
Astropecten armatus, the spiny sand star or Estrella de Arena, is a sea star in the family Astropectinidae. It is found on sandy or gravelly areas in the East Pacific ranging from California (USA) to Ecuador .