Subject: Do dolphins produce electricity?

I am doing a project on animals that produce electricity and , as I understand 
it, fish are the only animals that can produce electricity (generally although 
all animals use electricity in their nervous systems).  My sources have told me 
that the electricity produced by fish may be used to communicate (the fish 
produce chirps).  Don't dolphins produce chirps to communicate? They are 
mammals.

Re: Do dolphins produce electricity?