cash chinese coins French Indo-Chinese holy coins money old armor armored armorment armour armoured armourment backstraps bony ridges crocodile crocodylus-porosus danger dangerous dorsal-surface estuarine-crocodile exotic fauna hide hornback huge Indo-Pacific-crocodile large largest-reptile leather leathery lethargic omnivorous opportunistic opportunistic-predator osteoderms patterns powerful predator reptile reptilian ridges rough rugged saltwater-crocodile scales scutes skin tail tail-scutes territorial texture textured textures 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 Sousa-chinensis spots spotted teeth wild wildlife