Or have you noticed how the walls of a fish tank sometimes turn green and slimy? These are all examples of algae—but there is a lot more to the algae story! On the right side of the cover, it is ...

Algae-cleaning fish keep aquariums clean by eating algae. They help keep the water clear and create a healthy environment for other fish. Tap to read in detail.

This classic saltwater aquarium fish – popularized by the movie ... especially filamentous and green-haired algae. These mottled fish with captivating big eyes don’t love their own kind ...