It is of interest to note that while some dolphins are reported to have learned English -- up to fifty words used in correct context -- no human being has been reported to have learned dolphinese. Carl Sagan (1934 - 1996)
Swain's world (The Cosmic Unicorn #1);
A Day in the Life (Alternate Hilarities #3);
The Lawnmower that Ate Manhattan (NIEKAS, I forget the issue);
Spring Cleaning (Sound Waves);
Shadow Play (The Parasitorium II: Parasitic Sands, 2007);
Crow's Feat (Free Fall (February, 2007)
Oh, and Obligatory Holly Lisle Affiliate Link for writing workshops and stuff.