You don’t have to look for them in Hawaii. They are every where and they are not afraid of human.
They will not run away from you but please do not touch or chase them. They are totally protected also they are on red list (The IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List)).
A sea turtle can be adult only ONE in 5000.
A sea turtle is usually zoophagous but Adult green sea turtle is herbivory. They are mainly eat sea weed.
Hawaiian Green sea turtle