Swarms

Of dolphins:

Which we like.
And bees:

Which we don't like...

Each day we've sailed we've seen huge pods of fast moving dolphins. The waves they create make them look like a river as they travel at high speed in long tightly packed groups. One pod appeared to be a mile or more in length and was a dozen or more dolphins in width.
The bees are another story. We're seeing similar numbers of these creatures--but there is nothing endearing about having a thousand bees show up on your boat in search of water...
Making screens has just jumped in priority.