Coral

Coral is a book-only character, coming to first view in Where There's a Wolf, There's a Way. She is the aunt of Lagoona Blue and a sea monster. She is a saltwater monster from Great Barrier Reef, which is different from the other Australian sea, the cartoon counterpart, Great Scarrier Reef. She loves her niece Blue very much, and treats Lagoona as if she were her own daughter. Though Lagoona is only called Blue in the books, and Coral's last name is never revealed, her full name might be Coral Blue.