Shark Family Tree

Oxynotidae: Roughsharks

The Family Oxynotidae (or Roughsharks) includes five unmistakable species of small sharks with rough skin; flat, blunt snouts; small, thick lips; and close-set large nostrils. They’re easily spotted by their paired extreme, high-spiked dorsal fins and stout, triangular cross-sectioned bodies and lack of anal fins. And don’t they look a bit look footballs with fins? … Continue reading

Etmopteridae: Lanternsharks
Shark Family Tree

Etmopteridae: Lanternsharks

Etmopteridae is a family of dwarf-to-medium sized sharks found nearly worldwide. This family has over 50 species, including the deepest known shark species found at a depth of 4500 meters. As their name implies, some species of Lanternsharks exhibit bioluminescence on their bellies, flanks and fins. In short, they actually glow! They use their photomarkings to blend in to ambient light (called … Continue reading

Shark Family Tree

Centrophoridae: Gulper sharks

Centrophoridae is a family of sharks with glowy, green eyes found nearly world-wide in cold to tropical waters mainly between 200 and 1500 meters deep. Little is known about these cylindrical sharks, but we do know that several species are social, forming schools and aggregations like other deep-sea sharks. This family includes the oldest living deep-sea shark … Continue reading

Shark Family Tree

Hexanchidae: Cow sharks

All but one shark in this family are deep-sea creatures; the Broadnose Sevengill Shark permanently inhabits shallow coastal waters. Hexanchidae sharks are six or seven-gilled, heavy-bodied with lowered mouths (called ventral or subterminal mouths). Their upper teeth are cuspidate for impalement, and lower teeth are broad saw-like for cutting; a very “knife and fork” dentition combination.  They … Continue reading