Related Clues:

• Second fish is an eel
• Spiv behind man's back is a slippery character
• Large predatory eel
• One fish and second fish
• Predator eel
• Firth seen snaking near the coast?
• Fish cooked in a cheese sauce — that's not new
• Slippery character in the main
• Interpretation of 14 is fishy
• Fish in ethical manner without using lines
• Encounter for a reef diver, maybe
• Razor-toothed reef dweller
• Eel
• Kind of 28 Across
• Fish suitable for tea dance, say