Should he start a Discus Tank?

Reef fish in different oceans often develop similar color patterns because evolution explores the same set of biological possibilities.

Why does a Caribbean angelfish sometimes resemble its Indo-Pacific cousin, even though they have never lived in the same ocean? Why do coral reefs harbor such a wide range of stripes, spots and ...

When a young tomato anemonefish (a cousin to the famous Nemo) arrives at a new home, it carries extra white stripes. These ...

Tomato clownfish perform a dramatic underwater wardrobe change based on the social dynamics of their environment ...

Many mammals have fur the color of brown and black. Why don't they have more exotic colors, like purple and neon pink?