Stout Bobtail – Rossia macrosoma

The Stout Bobtail, scientifically known as Rossia macrosoma, is a fascinating cephalopod belonging to the family Sepiolidae. This species is commonly found in the waters of the North Atlantic Ocean and the Mediterranean Sea, particularly in the continental shelf and slope regions. Its distinctive features and unique adaptations have made it a subject of interest for marine biologists and enthusiasts alike.

Description & Characteristics

The Stout Bobtail is a relatively small cephalopod, typically reaching a maximum size of about 10 centimeters in mantle length. Its body is characterized by a stout, rounded shape, giving it a distinctive bobtail appearance. The mantle, or main body, is covered in small, granular papillae that provide camouflage and protection from predators. The animal’s arms are relatively short and stout, with a total of eight arms and two longer tentacles used for catching prey.

Habitat and Occurrence

The Stout Bobtail, Rossia macrosoma, prefers to inhabit the continental shelf and slope regions of the North Atlantic and Mediterranean Sea. This means it can be found in depths ranging from the shallows to about 800 meters. It is particularly prevalent in the bathyal zone, a marine zone that extends from the continental shelf break to the abyssal zone. This diverse environment provides the Rossia macrosoma with a variety of habitats and prey options.

Taxonomy

The Stout Bobtail, Rossia macrosoma, belongs to the Class: Cephalopoda, the same class that includes squid, octopus, and cuttlefish. This species is further classified within the Order: Sepiida, which encompasses cuttlefish and their close relatives. Finally, it is part of the Family: Sepiolidae, a group known for their small size and generally sedentary lifestyle.

Feeding

Rossia macrosoma is a specialized predator, primarily feeding on shrimp. Its short arms and powerful beak are well-suited for catching and consuming these crustaceans. The Stout Bobtail’s ability to blend in with its surroundings is crucial for ambushing unsuspecting prey.