As told by Finchaser...
Fin comes off the beach after a successful dawn bite. It's now 8am and the water is dead as the tide has gone slack.
Guy walking on to the beach:
Hey how did ya do today?
Fin:
We did great, 8 to 11 apiece, still swimming.
Guy:
Hey great I'm going down to catch mine right now!
Fin:
Well the bite is over, the tide is slack now. Try to get here at 6am tomorrow and you should do well.
Guy:
6AM??? No way, that's too cold then, I'd rather come at 8.
No fish for you!!!