It is important for you smart crystal kids to try to talk to the dolphins. Here are some resources for you:

How to read a spectogram. This is more for human voices, but useful.
Bioacoustics of Marine Cetaceans
Spending time with the dolphins
DolphinEAR - Formerly DolphinPHONE. To talk to dolphins, you first must listen to them.
DolphinEAR sound samples
Cetaceans and seeing sounds