From Discovery Channel:
Whale Vocab Richer Than Thought
Jennifer Viegas, Discovery News
Nov. 17, 2006 — It may not be language as we know it, but whales have no shortage of ways to make themselves understood.
So broad is their vocal repertoire, in fact, that whales can call to their young, woo potential mates and even express emotions, according to researchers who have identified 622 social sounds in humpback whales.
Their work will be presented at the upcoming joint meetings of the Acoustical Society of America (ASA) and the Acoustical Society of Japan in Hawaii.
Hear their sounds: here.