Alcithoe fusus is a species of large sea snail, a marine gastropod mollusk in the family Volutidae, commonly known as the “Fusiform Volute”. This species is recognized for its distinctive elongated, spindle-shaped shell.
Description & Characteristics
The shell of Alcithoe fusus can reach impressive sizes, with an average length of 150 millimeters (6 inches), but can grow up to 200 millimeters (8 inches). Its characteristic spindle shape gives rise to its common name. The shell is typically smooth and glossy, with a rich brown color adorned with intricate patterns of white and yellowish-brown markings. The aperture, or opening of the shell, is elongated and narrow, with a distinct siphonal canal at its base.
Habitat and Occurrence
Alcithoe fusus is a benthic species, meaning it lives on the ocean floor. They are typically found in depths ranging from 20 to 100 meters (66 to 328 feet). Their preferred habitat is sandy or muddy substrates in the bathyal zone, a marine environment characterized by a lack of sunlight and the presence of moderate water pressure. These snails are found primarily in the south-western Pacific Ocean, particularly off the coasts of New Zealand and Australia.
Taxonomy
Alcithoe fusus belongs to the class Gastropoda, an extensive and diverse group of mollusks that includes snails, slugs, and nudibranchs. Within the Gastropoda, Alcithoe fusus is classified under the order Neogastropoda, a group of predatory sea snails. The genus Alcithoe, to which Alcithoe fusus belongs, is part of the family Volutidae, a family of sea snails known for their often-large and intricate shells.
Feeding
Alcithoe fusus is a carnivorous predator that feeds primarily on other marine invertebrates, particularly polychaete worms. They use their radula, a ribbon-like structure in their mouth, to scrape and tear their prey. Their diet also includes crustaceans, which they capture using their strong foot and muscular siphon.
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