How long is a normal shark will be?

Size of Sharks
Sharks and batoids show great diversity in size.
1 . The largest of the sharks is the 13.7-m (45-ft.) whale shark (Rhincodon typus).
2. Among the smallest sharks are the 22- to 25-cm (8- to 1 0-in.) midwater shark (Squaliolus laticaudus) and pygmy ribbontail catshark (Eridacnis radcliffei).
3. The largest batoid is the manta ray (Manta birostris), which reaches widths over 6.7 m (22 ft.).


2008-04-21 18:56:00 補充：
The majority of the 370 species of sharks are harmless, are less than 2 m long, and many species are less than 1 m long. The largest species, the whale and basking sharks, are plankton feeders, and no threat to humans.

The length of a normal shark will be 20m.