Foa
Foa is a genus of marine snails in the family Trochidae, commonly known as top shells. These gastropods are characterized by their conical shells with a prominent apex, and their distinctive, often brightly colored patterns.
Common Names
Depending on the specific species, common names for Foa snails may include "top shell," "top snail," or "painted top shell." The name "Foa" itself is not widely used as a common name.
Characteristics
Foa snails are typically small to medium in size, with shell diameters ranging from a few millimeters to a few centimeters. Their shells are usually conical in shape, with a pointed apex and a wide, rounded base. The surface of the shell is often ornamented with ribs, spiral cords, or other sculptural features. The shell aperture (opening) is usually circular or oval-shaped.
Foa snails are herbivorous, feeding on algae and other plant matter. They use their radula, a tongue-like structure covered in tiny teeth, to scrape food from surfaces. These snails are also known for their vibrant coloration. The shells of many Foa species exhibit striking patterns and color combinations, often in shades of red, orange, yellow, green, or blue.
Environments
Foa snails are found in a variety of marine habitats, including rocky shores, coral reefs, and seagrass beds. They are generally found in shallow water, but some species may occur at depths of up to 100 meters. Foa snails are widely distributed throughout the world, with species found in tropical, subtropical, and temperate waters.
References
* World Register of Marine Species (WoRMS) * The Marine Snail Genus Foa (Gastropoda: Trochidae) from the Indo-Pacific * The Trochidae of the Western Atlantic Ocean with a Review of the Subfamily Stomatellinae