@oboogie was heading in the right direction,
I know a bit about that,it looks like this to me ....
"The Meaning of the Hawaiian Bone Fish Hook. The deep connection and reverence the Hawaiians had for the ocean created the meaning behind the Hawaiian fish hook necklace. It represents strength, prosperity, abundance, and a great respect for the sea."
https://en.wikipedia.org/wiki/Hei_matau
https://www.google.com/search?q=hawaiian+bone+hook+design+meaning&rlz=1C1CHHJ_enUS531US531&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwj2yvTL657WAhXFjlQKHQ2fCloQsAQIcg
"Makau – Fish Hook Pendant
Hawaiians have a deep connection and understanding of the ocean. The Makau is a fishhook pendant, which was used in ancient times to find food. During the early eras, locals would create fishhooks out of various materials – bones, wood, coral and stone. Today, the fish hook necklaces sold represent everything good: strength, prosperity and good luck. Pendants are often made in bone, wood or jade materials."
https://www.olukai.com/journal/2014/11/03/the-meaning-behind-hawaiian-symbols/