The Spiny Doris, Hudson’s Yellow Margin Dorid, scientifically known as Acanthodoris hudsoni, is a captivating species of sea slug belonging to the nudibranch family. These vibrant creatures are a common sight in certain marine environments, adding a splash of color to the underwater landscape.
Description & Characteristics
Acanthodoris hudsoni is characterized by its distinct yellow margin, which encircles its body, contrasting sharply with its overall reddish-brown or orange coloration. As its name suggests, the Spiny Doris possesses numerous small, spiky projections on its dorsal surface, giving it a slightly rough texture. The species can reach a maximum size of approximately 50 mm.
Habitat and Occurrence
Acanthodoris hudsoni prefers the colder waters of the North Atlantic Ocean. Its distribution stretches from the coasts of Norway and Iceland all the way down to the British Isles and the western shores of France. The Spiny Doris, Hudson’s Yellow Margin Dorid is commonly found in the intertidal zone and shallow subtidal areas, typically at depths ranging from 0 to 50 meters. This makes it a resident of the neritic zone, a region characterized by its proximity to the coastline and the influence of sunlight.
Taxonomy
The Spiny Doris, Hudson’s Yellow Margin Dorid, Acanthodoris hudsoni, belongs to the Nudibranchia order within the Gastropoda class. It is a member of the Onchidorididae family, a group known for their often colorful and sometimes spiky appearances.
Feeding
Acanthodoris hudsoni is a specialist feeder, primarily consuming bryozoans, commonly known as sea mats. These small, colonial invertebrates are a staple food source for the Spiny Doris. Acanthodoris hudsoni also has a preference for sea squirts, another type of marine invertebrate. This selective diet reflects the species’ specialization in feeding on specific types of prey found within its habitat.
Image References