6. Wrasse aquarium fish
Wrasse fish makes it to this list because of variety and price. There are over 500 Wrasse aquarium fish varieties in the market today. The rarest Wrasse aquarium fish species cost between $100 and $250. The cheapest can go for as low as $15. Given the price range, fish size and variety, it is easy to see why Wrasse fish are among the most popular aquarium fish for every budget.