Good Riddles

Question: While the barracuda uses opportunity and speed to prey on other large fish, it has little interest in humans. Barracuda attacks on humans are rare; but when they do, what is the reason?

Question: What fish only swims at night?

Question: What do you call a mad elephant?

Question: What kind of mouse does not eat, drink or even walk?

Question: What has hands, but can not clap?