Donax gemmula, commonly known as the Gem Clam, is a species of marine bivalve mollusk belonging to the family Donacidae. This small, yet captivating clam is a familiar sight in certain coastal regions, adding to the diversity of marine life.
Description & Characteristics
Donax gemmula is a small clam, typically reaching a maximum size of about 25 millimeters (1 inch) in length. Its shell is characterized by a distinctive, oval shape with a smooth, glossy surface. The color of the shell is usually a creamy white or pale yellow, often adorned with intricate patterns of reddish-brown or purple streaks. The clam’s hinge line is straight, and its beak is prominent.
Habitat and Occurrence
Donax gemmula is a common inhabitant of sandy beaches and nearshore environments. It is typically found in the intertidal zone, where it burrows into the sand to avoid being washed away by the tides. Donax gemmula prefers areas with moderate wave action and a good supply of oxygenated water. This species can tolerate a wide range of salinities and temperatures, making it adaptable to various coastal environments. Donax gemmula is commonly found in the neritic zone, which is the shallow coastal waters extending from the shoreline to the edge of the continental shelf.
Taxonomy
Donax gemmula belongs to the Class: Bivalvia, Order: Cardiida, and Family: Donacidae. This classification places it within a group of marine bivalves known for their heart-shaped shells and their ability to burrow into sediment.
Feeding
Donax gemmula is a filter feeder, meaning it obtains its nourishment by filtering microscopic organisms and particles from the surrounding water. It uses its gills to trap food particles, which are then transported to its mouth.
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