Related Clues:

• It may help fill your tank
• Flashy tank swimmer
• "Four" before words, sometimes
• Neon --
• Brilliant fish
• Popular aquarium beauty
• Colorful freshwater fish
• Tri- plus one
• Accosting and detaining (someone)
• Bright fish; four (prefix)
• Bright tropical fish
• Fish caught in intricate trap
• Fish - without question, four are swimming around
• Fish stocked by elite traders
• Fish seen in groups of four