Sea slugs and snails

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Across
  1. 3. A slug that decapitates its head for an unknown reason
  2. 6. a sea slug that uses its foot as makeshift flippers
  3. 7. literally a snail with wings
  4. 8. A type of sea slug that looks like a creature from a popular anime and game series
Down
  1. 1. a dancing Red Sea slug
  2. 2. a small Gastropod that has a trunk like mouth for eating of hard surfaces
  3. 4. a family of slugs related to number 3 that can photosynthesise
  4. 5. an invasive snail that easily takes over fish takes with there fast breeding speeds