Dominica Phetteplace's "The Cult of Whale Worship" (short story, genetic engg, free): Engineering a bug to help conserves whales

A Japaneses genetics researcher gangs up with two whale conservationists to design a very unusual parasite...

Fact sheet.

First published: Asimov's, October/November 2011.
Download full text from publisher's site. [via SF Signal]
Rating: A.
Added to my "best of 2011" list.