Where's the best snorkeling around Zihua??

I would very much like to try Isla Ixtapa. I heard something about reasonably priced ferry/boats rides out there. Where exactly do you catch this boat?(Remember I've never been here so do not know the landmarks, etc.) Do you pay the captain or do you buy a ticket from somewhere? I can get the la ropa bus into town but do I need to find another bus to get closer to this boat dock area?

I was at Las Gatas last Sunday but it was very shallow & footware was a definite necessity. It was really packed that day. I didn't notice any ocean life at all, not even in the mangroves. I walked the beach as far south as I could but I was turned back as it was private property.

So Isla Ixtapa it is. Anyone else in the area care to venture out there (I'm available from now until into March/22. I would gladly take a taxi if anyone else wanted to share it. I've always enjoyed diving or snorkeling in groups. It's fun to share the experience over a beverage afterwards. Everybody has something different to bring to the table.