Possible Clues:

• Swinging gorilla grabs a serpent's tail hiding in swampland
• It's all one to rag this predator
• Swamp crocodilian
• Everybody Russian keeps a model 13
• It's all one so to rag in dangerous confusion
• Everglades beast
• Semiaquatic reptile
• 'She had, the guides informed him later, / Been eaten by an --' (Ogden Nash)
• Gorilla at loggerheads with a snapper!
• Creature that disturbed a girl a lot