Squalus acanthias

Squalus acanthias, commonly known as the Spiny Dogfish, Piked Dogfish, or Spurdog, is a species of shark belonging to the family Squalidae.

Taxonomy

The Squalus acanthias is part of the Squalidae family, which is a family of dogfish sharks. The genus Squalus is derived from the Latin word for shark. The species name acanthias refers to the shark's two spines.

Description

The Squalus acanthias is a small to medium-sized shark, typically measuring between 75 and 105 cm in length. It is characterized by its two dorsal fins, each equipped with a venomous spine. The body coloration is gray to brown, with a lighter underside.

Distribution and Habitat

The Squalus acanthias is found in various parts of the world, including the Atlantic and Pacific Oceans. It inhabits both coastal and offshore waters, and can be found at depths of up to 900 meters. The species prefers temperate waters and is often found near the sea floor.

Behavior and Diet

The Squalus acanthias is a schooling species, often found in large groups. It is a carnivorous predator, feeding on a variety of prey including fish, squid, and crustaceans.

Reproduction

The Squalus acanthias has a unique reproductive system among sharks, known as ovoviviparity. The females retain the eggs inside their body until they hatch, and the young are born live.

Conservation Status

The Squalus acanthias is currently listed as Vulnerable by the IUCN. Overfishing is the primary threat to this species.

See Also

• Shark
• Squalidae
• Ovoviviparity