the process of create a symbol & the meaning of the symbol

actually,im still use the same tools to create the symbol
to draw the ellipse,im use the ellipse tools
and for the dolphins shape im use pen and pathfinder to finished the shape
and for the colors part~im use gradient all the way
for the circle that actually represent sea
i had used 5colors of blue and i had adjust the angle to 30' because i want to create a light blue to dark blue effect to represent natural sea color.
and for the "dolphins shape",i had used dark grey and white and adjust the angle to 280' and 100' because dolphins color is actually grey on top and white at below of the body so i had success make it after do few research..
at the last, im also use "drop shadow" effect to make the graphics look more real because having a shadow is it looks real than do not have shadow??haha
hmm....i had choosed to draw the dolphin shape because doplhins are minarity and they are facing extinction too.So i hope to represent that we should protect animals especially those are facing extinction.