I'm living in the Marshall Islands and new to snorkeling. I'm fascinated by the sea life and want to learn to correctly identify all that I see. I took pics of an octopus caught at low tide in tidal pool. The video is too large to attach. I've tried to ID and assume it's a Day Octopus. I couldn't see all of it and was not prepared at the time to know what to look for. But I can't help but wonder if it was a Giant Pacific.