Researchers say that Orcas can co-ordinate attacks without using normal communication channels.

“They go into stealth mode – completely silent,” said Dr Deecke [from the University of St Andrews in Scotland]. “This raises the question: how are they communicating?”

It seems that orcas can carry out complex, co-ordinated mammal-hunting trips without “talking to each other” at all.

[…]

Dr Deecke thinks that the orcas might “rehearse” their hunting routines, to learn the position of each group member.

“They tend to be very predictable,” he said. “I often know exactly where they are going to surface.”

Very predictable stealth mode? Funny. I assume he is trying to make a point with the contradiction in what he is describing.

Haha, missed again