Endangered Hector's dolphin (Cephalorhynchus hectori) surfacing in milky blue waters of ancient flooded volcanic crater: Akaroa Harbour, South Island, New Zealand

endangered hector's dolphin cephalorhynchus hectori surfacing milky blue waters ancient flooded volcanic crater akaroa harbour south island new zealand na south pacific action surface dolphin dolphins mammal mammals marine sea ocean speed fast travelling swimming dorsal fin turquoise