Bull Shark

http://blog.al.com/live/2009/07/bull_shark_spotted_
on_alabama.html

Tiger Shark

http://seapics.com/feature-subject/sharks/tiger-shark-pictures-0
06.html

Two facts:
1. Adult Bull Sharks are usually 11 feet long.
2. They can live in both freshwater and seawater.

Two facts:
1. They have an average length of 12 feet.
2. It gets it's name for the stripes it has, resembling a tiger.