Whenever you send an email using a pre-populated mailer such as the one used by SeaWatch, it's important to personalize the message. I added the following as the last paragraph of my letter:
"As an active fisherman, both in your Cabo San Lucas region as well as my home waters in Southern California, I have seen first-hand the impact that such destructive methods have had on the fishing in both regions. The time to act is now, while there are still fish to be saved. Please do what you can to take action now to stop this potential disaster."
The personal touch helps to drive home the point that this is indeed personal to us.