appearance beak beaks blood-flow captive captivity Chinese-white-dolphin clever coastal-animals color coloration colored colorful colors colour coloured colourful colours confined conservation contrast contrasting dark-spots entertaining entertainment environment environmental Indo-Pacific-humpbacked-dolphin mammal marine-park medium-sized near-threatened oceanic perfoming performance pink pink-dolphins restricted skin Sousa-chinensis spots spotted teeth wild wildlife access-denied advice alert appropriate-behavior appropriate-behaviour avoid communicating communication concern denied directions exceptions limitations limited limited-entry not-allowed not-permitted permission-denied prohibited prohibition regulations responsible restrictions rules sign signs vehicles warning warning-sign access-limited advising allocated allocation arrow authorised authorized automobiles behave black blue communicate directive emergency emergency-vehicles entry-denied entry-prohibited information informing limited-access no-access no-entry red restriction safety white barbed wire barred entrance gate gateway new zealand rockpile rocks rust stones wellington enjoy fountain fun games happy mountain park rush mountian theme park welcome animal announcement appropriate behavior appropriate behaviour care careful caution control dog dogs lead leash restrain restrained ban banned no-golf risk risks risky signage behavior behaviour cautious keep-out keep-to-path