Answer:
I'm not a pet with long floppy ears I just share their name when a ship disappears. What am I?
When they are caught, they are thrown away. When they escape, you itch all day.
My first is in ocean but never in sea. My second's in wasp but never in bee. My third is in glider and also in flight. My whole is a creature that comes out at night.
I am a predator with a strong jaw. I live in water and have lots of sharp teeth. What am I?
I am a animal that is cute but dangerous, what am I?
Break me and I am better immediately set and harder to be broken again.