[JohnR]

Originally Posted by goosefish

I'm new to it, a rank amateur. I'm a surf caster/ r&r guy who has taken up free diving. It burns more calories than a good session in the bedroom. Anyway.

A guy told me to listen. You'll hear fish before you see them.

With blackfish you hear them chew. I think they're using those teeth in the backs of their throats to grind up crabs and mussels. When you're in a spot that has a lot of feeding blackfish the sound is like hundreds of stones rolling over and grinding against each other.

But the bass noise--the big bass noise--is new to me. But now I know. A guy told me it's the pressure wave of water being displaced from their broad-sweeping tails.

Very cool.

Very cool is right