Crustaceans Weight Angler Location Date Opihi 8.32 oz Garrick Fukuyama Kapa'a Beach Park, Big Island 02/22/17 On February 22, 2017, me and my friend went down to Kapaa beach park to pick opihi thats when I came across this enormous opihi. After we had finished picking, I went to Arakaki store to have it weighed and measured. It weighed 8.32 ounces length was 4 inches x 3 3/4 inches.