What am I?

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Across
  1. 4. I'm small and have 6 legs
  2. 6. pirates love searching for it
  3. 7. I can be soft but also crunchy and have alot of chocolate chips
Down
  1. 1. I help save cities by using my web
  2. 2. , I can fly everywhere and I'm found at the beach eating left over food
  3. 3. I can be found at the bottom of the ocean and I am shaped like a star
  4. 5. place items into it