According to the 'Shark Extremes' link below, there are at least three contenders for smallest shark species. They are so similar that differences may be unimportant, and accurate measurements of unambiguously adult specimens are difficult to make. They are Etmopterus perryi, Squalidus laticaudus, and Eridacnis radcliffei.
whale shark
From smallest to biggest: Herring Piranha Salmon Shark
No, the smallest shark is actually the dwarf lanternshark, which grows to be about 7-8 inches long. The cookiecutter shark, while small in comparison to other sharks, can reach lengths of about 16-22 inches.
lemon shark
fish
Etmopterus hillianus
the shark fish
3000 pounds
the worlds biggest is the whale shark and the smallest is the kandiru
Only 1.2 cm.
the african morepork shark
24m (LARGEST) 9m (smallest)