armor armored armorment armour armoured armourment Australian-freshwater-crocodile backstraps basking bony ridges crocodile crocodilian crocodylus-johnsoni crocodylus-johnstoni danger dangerous dorsal-surface exotic fauna freshie hide hornback Johnston's-crocodile large leather leathery lethargic omnivorous opportunistic opportunistic-predator osteoderms patterns powerful predator reptile reptilian ridges rough rugged scales scutes skin tail territorial texture textured textures reflection crocodylus-porosus estuarine-crocodile huge Indo-Pacific-crocodile largest-reptile saltwater-crocodile tail-scutes abstract appearance background brown colored coloring colors coloured colouring colours contours contrast contrasts cracks fissures flaws grit gritty layered layers levels light lines natural ribbons rock rock-face rockface rocky sandstone sandy shade shades of color shades of colour shadows shape shaped shapes stone strata stratum sunlight sunny sunshine surface surfaces veins wallpaper