What is Earth's saltiest sea or body of water?

Which is the largest freshwater lake in the world by surface area?

What is the average salt content of ocean water?

Which of these fish can live in both fresh and salt water?

What famous lake monster is said to live in freshwater?

What percentage of Earth's water is freshwater?

What color is most freshwater dolphins?

Which great lake is entirely within the United States?

What percentage of all animal species live in the ocean?

Which freshwater fish can breathe air and walk on land?

What is the largest freshwater fish in the world?

Which famous aquarium fish is actually a saltwater species?

What percentage of Earth's freshwater is frozen in glaciers?

Which popular aquarium plant can grow in both fresh and salt water?

What is the most popular freshwater aquarium fish?

Which turtle species can live in both fresh and salt water?

What color is most saltwater coral reefs?

Which famous lake contains 20% of Earth's unfrozen freshwater?

What percentage of the world's population lives near coastlines?

Which popular seafood originally came from freshwater?