a (second, mostly saline) crossword for peanut

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Across
  1. 4. Appendage extended across a board
  2. 6. Reef archipelago of four monarchs
  3. 8. Almost as fast as panda food
  4. 12. Favourite elasmobranch that can’t keep its distance
  5. 16. Body of water where sunrise meets less resistance
  6. 19. Current spins like appliance
  7. 20. Parts playing hide-and-seek
  8. 22. Al₂O₃
  9. 23. Birther of live young with four limbs turned to eponymous dolphin of 1996 film
  10. 26. Scariest fish in the ocean
  11. 27. Favourite classroom predator
  12. 30. Volcanicouting ill-advised after dark
  13. 31. Midnight zone
  14. 32. Sharp-edged tool with gills, nocturnal
Down
  1. 1. Royal waddle on subantarctic shores
  2. 2. Holiday ahi
  3. 3. Reef rambler with an awkward gait
  4. 5. Aotearoan giant, ironically larger
  5. 7. Stopping place for pilgrim returned from the Holy Land
  6. 9. Swarm of shrimp-like ;) creatures beneath Southern waves
  7. 10. Resembling a cartoon bird in icy water?
  8. 11. Dungeness crab starts life drifting as
  9. 13. Collective noun electrifies barracuda
  10. 14. Tubular drifter she dislikes
  11. 15. Oxygen-transporter hue of lucky crustacean
  12. 17. Rorqual mistaken for matrimonial title
  13. 18. 007eats plankton?
  14. 20. Long-tailed predator mirrors social expression in encounters
  15. 21. Little ink producer with truncated rear
  16. 24. Ocean layers climbed nightly, abbreviated
  17. 25. Cichlid kingdom only skimmed
  18. 28. Cold-blooded hot plasma
  19. 29. Sediment hits peak where detergent meets game platform, for short