Stonefishes are solitary organisms.  Sexual reproduction is achieved by females depositing unfertilized eggs on the ocean floor for males to spray their sperm over.  The fertilized eggs hatch in a few days and most are consumed by other organisms, such as the Great Barracuda, allowing only a fraction to reach adulthood.

This photo was taken in the Gulf of Aqaba, Red Sea. Photographed by Mr. Mohammed Al Momany.

These guys have some cool secrets you can read about in Fun Facts!