Possible Clues:

• Long-legged crustacean
• Crispbread put out for sea creature
• Seafood for which crispbread would be out of place
• Crustacean with long thin legs
• Creepy crawler
• Crispbread made specially for shellfish
• Crustacean devoured redcap's rib
• Crustacean with long, slender legs
• Creepy sidler
• Type of crustacean