Related Clues:

• Goldfish relative
• Have lots of beefs
• Be nitpicky
• Izaak Walton's ''very subtil fish''
• Minnow relative
• Gripe, gripe, gripe
• Bottom-feeding fish
• Bottom feeder
• 21-Across. e.g.
• Talk and talk and talk and talk
• Fault-find
• Koi
• Find fault with fish?
• Be a nitpicker
• Be a bellyacher