Whenever Orca aka killer whales are not around, they need to do this "breathing air" thing couple times and very quick then they submerge and turn off their sonar.
Even though Orcas are both vicious to their own sea mammal species and generous to humans, I kinda dislike Orcas. One thing I don't tolerate the most is when they kill and bully their own kind especially the offsprings when they're just few months old.