After noticing his urchins carrying rocks, shells and even hermit crabs around in his 120 gallon saltwater aquarium, a Colorado aquarium enthusiast started making them custom hats. Wilson Souza's ...

Setting up a saltwater aquarium is expensive because you must invest in specialized equipment. You can’t cut corners with saltwater apparatus because these tools are essential for maintaining a ...

On the reefs in the Florida Keys, plenty of snorkelers and scuba divers take in the sights, and others fish with spear guns for sport. But a small third group collects blue-legged hermit crabs, ...