A new sea every day, the same for everyone. Go for the highest score or the lowest: both records count. Protected animals (red outline) take points away.
Drag from the boat to lay out the net, then come back to it to close the circle. Everything inside is caught. Animals under the net itself slip away.
Drag from the boat down to the seabed. Every animal touching the line (above, below or beside it) bites. Crossing over a fish scares it off (no points) and costs 2 squares of line. Crossing a protected animal hurts it: the penalty counts. Only rocks block the way. The line must touch the sand before you can reel it in.