Orcas are the largest members of the dolphin family. Porpoising is a common behaviour. Here is a normal porpoising with the rare belly up porpoising that Lifeforce documented in March. Lifeforce's Peter Hamilton has studied cetacean behaviours for over 25 years. He has bear witness to the decimation of fragile ecosystems. These special lives of orca are yet another reason to try to save orcas and oceans. Time is running out! You have signed this petition and you want to take further action? You can contribute to protecting these orcas through making a donation to Lifeforce Foundation through Paypal.http://www.lifeforcefoundation.org/support.php Thank you!