And so begins the Weird Tales section of the disaster:

Sri Lankan wildlife officials are stunned -- the worst tsunami in memory has killed around 22,000 people along the Indian Ocean island's coast, but they can't find any dead animals.

I have a feeling when they really start looking some will turn up. However, it wouldn't surprise me to learn many animals did head for the hills when things started to come apart. There must be a whole host of subtle environmental cues that happen when zillions of gallons of ocean water draw back and then suddenly surge forward, and just because we ignore them doesn't mean others will.