Related Clues:

• Eel — and second fish — in this firth?
• Scaleless eel
• Double-jawed eel
• Coral reef eel
• The area ruled by Macbeth before he became king of Scotland
• Eellike predator
• Fish with second fish
• Historic county known as Elginshire until 1919
• Menacing eel
• With 20-Down, sharp-toothed fish