The Noble Pen Shell, Fan Mussel, Sea-wings, scientifically known as Pinna nobilis, is a large, bivalve mollusk native to the Mediterranean Sea. This species is characterized by its distinctive elongated, fan-shaped shell, often referred to as “sea-wings” due to its resemblance to a bird’s wing.
Description & Characteristics
The Noble Pen Shell, Fan Mussel, Sea-wings (Pinna nobilis) is a remarkably large bivalve, reaching a maximum size of up to 120 centimeters in length. The shell is thin, fragile, and exhibits a striking fan-like shape. The exterior of the shell is typically a pale brown color with a smooth, slightly textured surface, often adorned with intricate patterns and markings. Its interior is characterized by a pearly white color, adding to its aesthetic appeal.
Habitat and Occurrence
The Noble Pen Shell, Fan Mussel, Sea-wings (Pinna nobilis) thrives in shallow, sandy, or muddy bottoms in the Mediterranean Sea. This species is typically found in depths ranging from 5 to 50 meters, favoring areas with moderate water currents. It is a common resident of the infralittoral zone, which is the marine environment extending from the low-water mark to depths of approximately 50 meters. Its preference for these habitats suggests a crucial role in the Mediterranean Sea’s ecosystem.
Taxonomy
The Noble Pen Shell, Fan Mussel, Sea-wings (Pinna nobilis) belongs to the Class Bivalvia, Order Ostreida, and Family Pinnidae. The classification within this extensive class of marine mollusks emphasizes its unique features, including its distinctive fan-shaped shell and specialized filter-feeding mechanism.
Feeding
The Noble Pen Shell, Fan Mussel, Sea-wings (Pinna nobilis) is a filter feeder, relying on plankton as its primary food source. It achieves this by drawing water into its body through a siphon, where microscopic organisms are captured and consumed. This feeding strategy plays a crucial role in maintaining water quality within its habitat and contributes to the overall balance of the marine ecosystem.
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