Orca sounds used to frighten whales back to sea

http://cnnstudentnews.cnn.com/2007/US/05/24/delta.whales.ap/index.html

POSTED: 8:02 a.m. EDT, May 24, 2007

The two Humpback Whales apparently took a wrong turn during their migration back to the feeding grounds of Northern Pacific. They traveled 90 miles into the inlands of Sacramento. They turned around until they reached the Sacramento River Bridge, and began swimming in circles. Scientists hope that the sound of Orcas will threaten the whales back into the ocean. They also acknowledge that the whales were spotted slapping their tails on the water, which shows that they are in distress. Their deep cuts appeared worsening, and the cuts were probably from propellers. A 3-4 foot cut on the whales appeared to have pierce through the blubber layer. The freshwater environment have made the normal, smooth skin of the whale rough and pitted. But what concerns the scientist the most is the whales slapping their tails on the water. Because this is abnormal and scientists now need to drive the whales back into the ocean without causing the whales to have more stress.

I think scientists should try to get the whales back into the ocean because the whales have spent more than a week in fresh water and they are not physically able to live in fresh water. Their cuts have appeared worsening and they appear to have a lot of stress. So hopefully the two whales will be able to return back to the ocean in the next couple of days and make it to their migration to the feeding grounds.