Fishermen found Brittany Jane Royal's body on Tuesday in Kalapana. The 25-year-old from Tustin was two months pregnant.
Her family says she had moved to Hawaii to teach yoga, and still can't really fathom what's happened.
"As a mother it's the hardest thing to imagine, losing a child and especially in a way like this," said Royal's mother, Julie Spahn Royal.
Police are now searching for 22-year-old Boaz Johnson, Royal's boyfriend. He's been missing since Monday, when the couple went camping together.