Ogo is a feathery seaweed that offers a crunchy texture and mineral-rich flavor to poke. It may be difficult to find on the mainland, but you can substitute seaweed salad found at your grocer's sushi counter.
Another island favorite. Maui onion is used because of its mild sweet flavor. If adding soy sauce, add it just prior to serving. I think kukui nut oil will work just as well. I was just thinking that this would be great with chopped limu (seaweed)!