The dolphin is a Maori symbol. The dolphin is a good omen, and is symbolic of playfulness, harmony and friendship. It also seeks to protect travelers, it is a symbol of protection.
The dolphin is a really old symbol.
Looking at a dolphin it seems that he is "smiling" and we may get the impression he turns always to human beings. Normally dolphin can be found in groups and often they accompany ships, therefore they seem to be friendly and social. They are considered to be intelligent.
We like their quickness, their ability their effortlessness, when they move in the water.
Even in the ancient Greece the dolphin where accompanists of souls, the accompnied them through the water to the Elysium.
Oftenly it has been widely reported, the Dolphins have attacked sharks to protect castaways.