Possible Clues:

• Swimmer with idiot on banks
• Fish with idiot on banks
• Fish river area, visiting West Sussex regularly
• Walter applies switchblade that's repeatedly gutted fish
• Fish with thick lips
• The two of us saving money after chopping head off fish
• Swears to move main residents
• Fool in mottled crew not having caught fish
• Marine fish of the Labridae family
• Waitress loses it with bright fishy type