There are sharks in the waters around Qatar, the shark Charmed mentioned was actually a grey reef shark.
Hammerheads have been reported off the coasts of all GCC states as its a part of the migratory patterns of the fish.
Tiger sharks have also been spotted/caught off the coast of Dubai (in the fronds of the palms) and Abu Dhabi.
February to April the sea snakes breed and will attack anything.

.
No one lady is ugly, the drink it's not enough!"