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Cryptic Conch Codex of Shellder
Challenging puzzle for experienced crossword solvers
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Across
  • 1. Connection seam between two shell valves in bivalves
  • 2. Ray-finned fish subclass, unrelated but often confused in marine taxonomy
  • 3. Rasping tongue-like organ absent in bivalves but crucial in other mollusks
  • 6. Term combining features of cartilaginous and bony fishes, a marine taxonomy curveball
  • 8. Class encompassing shelled mollusks with dual valves
  • 9. Aquatic invertebrates with exoskeletons, including clams and oysters
  • 11. Mollusk class with advanced nervous system and tentacles, unlike Shellder
  • 12. Describes organisms living on top of the seabed, context for Shellder habitat
  • 16. Free-swimming larval stage of bivalves and gastropods
Down
  • 4. Pertaining to organisms dwelling beneath the seabed surface
  • 5. Biochemical process of depositing calcium carbonate to form shells
  • 7. Dormant reproductive units, primarily in sponges but metaphorically in shell regeneration
  • 10. Larval stage preceding veliger in shelled marine larvae
  • 13. Pelagic mollusks known as sea butterflies, a rare Shellder ecosystem neighbor
  • 14. Mistaken cryptic hint for ten-legged crustaceans akin to Shellder relatives
  • 15. Class of mollusks including snails, differing from bivalves
  • 17. Protective outer shell found in various crustaceans and mollusks
  • 18. Muscle responsible for closing the shell in bivalves

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