Orcas - killer whales don't Breathe under water. They are mammals and Breathe air with lungs. They hold their breath when diving.
yes, they do its a shame, orcas life spans are often shortened by captivity
Killer whales - Orcas - yes. Salmon - no. Salmon is a fish, fish use gills.
The Orca is an air breathing aquatic mammal, and does have lungs.
orcas reproduce when they are ready.
No because they still have to breathe like others do to.
The same amount you wil just breathe in more often
Orcas are not endangered!!! Orcas have a high population, so that that no one know how many!!!
Orcas have no particular breeding season.
The population of Sandford Orcas is 195.
Orcas have often been seen killing sharks by biting and eating them. The tactic you describe has been seen used by dolphins, but not Orca.
Orcas do not live in Antarctica. Antarctica is a continent and orcas are marine animals. Orcas swim in the Southern Oceans that surround the Antarctic continent.