Table of Contents

Enchanted Learning All About Sharks!

Geologic Time Chart

The Tiger shark, a requiem shark

Carcharhiniformes

The nictitating membrane is an eyelid that protects the shark's eye during hunting.

Carcharhiniformes (anal fin, 5 gill slits, 2 dorsal fins, no fin spines, mouth behind the eyes, nictitating eyelids) - ground sharks, including catsharks, swellsharks, shysharks, houndsharks, weasel sharks, requiem, and hammerhead sharks

• Family Carcharhinidae: Requiem sharks (large, viviparous, 48 species)
  • Genus Carcharhinus
    • 29 species, including the Dusky shark, Silky shark, bull shark, blacktip reef shark, Oceanic whitetip shark, sandbar shark, galapagos shark, Blacknose shark, etc.
  • Genus Galeocerdo
    • cuvier: tiger shark
  • Genus Glyphis
    • gangeticus: Ganges shark
    • glyphis: Speartooth shark
  • Genus Isogomphodon
    • oxyrhynchus: Daggernose shark
  • Genus Lamiopsis
    • temmincki: Broadfin shark
  • Genus Loxodon
    • Macrorhinus: Sliteye shark
  • Genus Nasolamia
    • velox: Whitenose shark
  • Genus Negaprion
    • acutidens: Sicklefin lemon shark
    • brevirostris: lemon shark
  • Genus Prionace
    • glauca: blue shark
  • Genus Rhizoprionodon
    • acutus: Milk shark
    • lalandii: Brazilian sharpnose shark
    • longurio: Pacific sharpnose shark
    • ologolinx: Grey sharpnose shark
    • porosus: Caribbean sharpnose shark
    • taylori: Australian sharpnose shark
    • terraenovae: Atlantic sharpnose shark
  • Genus Scoliodon
    • laticaudus: Spadenose shark
  • Genus Triaenodon
    • obesus: Whitetip reef shark
• Family Sphyrnidae: Hammerhead sharks (like requiem sharks, but with broad heads) (9 species)
  • Genus Eusphyra
    
    • Species blochii: the winghead shark
  • Genus Sphyrna
    
    • Species corona: Scalloped bonnethead
    • Species couardi: Whitefin hammerhead
    • Species lewini: Scalloped hammerhead, bronze hammerhead, kidney-headed shark
    • Species media: Scoophead
    • Species mokarran: Great hammerhead
    • Species tiburo: Bonnethead, shovelhead, bonnet shark
    • Species tudes: Smalleye hammerhead
    • Species zygaena: Smooth hammerhead, balance fish, black hammerhead
• Family Scyliorhinidae: Catsharks (live in cold, deep water, have slit-like pupils) (89 species)
• Family Triakidae: Smooth-hound sharks, topes, whiskery sharks, houndsharks (eat mollusks and crustaceans, have flat, rounded teeth - leopard shark) (34 species)
• Family Hemigaleidae: Weasel sharks (5 species)
• Family Proscyllisae: Finback catsharks (small) (6 species)
• Family Pseudotriakidae: the False catshark (Pseudotriakis microdon) (1 species)
• Family Leptochariisae: Barbelled houndsharks (Leptocharias smithii) (1 species)

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