Misc: What modern word comes from the Arab 'hashishi'?

Questions

The fastest of all fish in the sea is the ----------, streaming forward at speeds near 68 miles per hour.?

Some species of earthworms in ---------- can measure more than ten feet in length.?

Thinking that its parents were a camel and a leopard, the Europeans once called the animal a "camelopard." Today, it is called the ----------?

The owl parrot can't fly, and builds its nest under tree ----------?

The favorite horses of both Alexander the Great (Bucephalos) and Julius Caesar both had atavistic mutations - extra toes. Horses normally have only one toe per foot, but are descended from horses with three or four toes on ----------?