A number of pagan traditions across the world depict the fish as a symbol of female fertility and inspiration. There are also certain fish that are considered to bring good luck. Additionally, the fish presence stands for adaptability, transformation, happiness, knowledge, and the power of prophecy. The fish symbol is possibly most famous for its use in the very early Christian Church, when the Ichthys was used to covertly recognize other believers, in defiance of extreme Roman Empire persecution. Water holds ancient symbolic meanings dealing with the subconscious and depth of knowledge. Water contains all the mysteriousness of the unknown. The fish swimming in this mysterious realm is the bearer of mystical messages.