My favorite fact/hypothesis about Orcas - they use a sono-pictorial language - almost like telepathy. Becuase Orcas primarily "see" through echolocation, and "speak" through sound. They are able to deliver "images to each other". So there isn't word for fish - just many different 3d images of fish they can send to each other. So cool! They don't have a need for descriptive adjectives!