Hairy Chiton,Tufted Chiton – Acanthochitona zelandica

The Hairy Chiton, Tufted Chiton, scientifically known as Acanthochitona zelandica, is a species of chiton, a type of marine mollusk with a distinctive eight-plated shell. This particular species is notable for its hairy or tufted appearance, a result of the unique structure of its shell.

Description & Characteristics

Acanthochitona zelandica exhibits a flattened, oval-shaped body, typical of chitons. The most defining feature is its eight overlapping shell plates, which are covered in a dense array of hair-like structures, giving the chiton its characteristic tufted look. These structures are actually spicules, which are small, pointed structures made of calcium carbonate. The shell itself can be quite variable in color, ranging from brown to gray to black, with shades of red or purple often present. The size of a mature Acanthochitona zelandica can reach up to 50 millimeters in length.

Habitat and Occurrence

The Hairy Chiton, Tufted Chiton, Acanthochitona zelandica, is a common inhabitant of the intertidal zone, often found clinging to rocks in the lower part of the intertidal zone. This means that they are exposed to the air during low tide, but submerged during high tide. Acanthochitona zelandica thrives in rocky shores and shallow water habitats. They are particularly abundant in the subtidal zone, extending their range into the deeper waters.

Taxonomy

The species Acanthochitona zelandica belongs to the Class: Polyplacophora, Order: Chitonida, and Family: Acanthochitonidae. This family is characterized by the presence of spicules on their shell plates, which are particularly prominent in Acanthochitona zelandica, contributing to its distinctive hairy appearance.

Feeding

Acanthochitona zelandica, like other chitons, are herbivores. They feed on a variety of algae, including filamentous algae, red algae, and brown algae. Their diet also includes carrion, detritus, and occasionally small invertebrates. They use their radula, a tongue-like structure with rows of teeth, to scrape algae off rocks and other surfaces.