Many people dream of keeping in-home aquariums. Yet, there are many different aquariums for many different living situations.

A Pennsylvania walleye angler had a surprise birthday gift from Lake Erie when he caught a 53.5-inch muskellunge. Here's how ...

But now, incredibly, new research suggests that the cleaner wrasse—a tiny, tropical reef fish—can recognize itself too, making it the first fish to do so. Scientists have long used a mirror ...