Pentanchidae
Pentanchidae is a family of deep-sea sharks within the order Squaliformes. Commonly known as “roughsharks”, they are found in the Atlantic, Indian, and Pacific Oceans. Pentanchidae sharks are characterized by their elongated bodies, with some species growing up to 1.5 meters in length. They are distinguished from other Squaliformes by the presence of five gill slits, two dorsal fins, and an anal fin. Their bodies are covered in rough, spiny scales, hence their common name.
Common Names
Pentanchidae sharks are commonly known as "roughsharks" or "fivegill sharks" due to their rough skin and five gill slits. Other common names include "bulldog sharks" and "sleeper sharks" due to their appearance and sedentary nature.
Characteristics
Pentanchidae sharks possess distinctive characteristics, including:
- Five gill slits
- Two dorsal fins
- An anal fin
- Elongated bodies
- Rough, spiny scales covering their bodies
- Small eyes
- A small mouth with a protruding snout
Environment
Pentanchidae sharks are primarily deep-sea dwellers, inhabiting depths ranging from 200 to 2,000 meters. They are found in both temperate and tropical waters, with some species preferring specific geographical regions. Due to their deep-sea habitat, information about their behavior and ecology is limited.