English: Groundsharks.
Genera: 270 species; 8 families.
ZoologyThey have a nictitating membrane which can be drawn over the eye to protect it.
Fins: 2 dorsal fins, an anal fin; five gill slits.
Families •
Carcharhinidae: Requiem sharks.
• Hemigaleidae: Weasel sharks.
• Leptochariidae: Barbeled houndshark.
• Proscylliidae: Finback catsharks.
• Pseudotriakidae: False catsharks.
• Scyliorhinidae: Catsharks.
• Sphyrnidae: Hammerhead sharks.
• Triakidae: Houndsharks.