animal bird bony casque cassowary casuarius feather feathers flightless helmet horn huge isolated ostrich bony fish coho fish outdoor outdoors salmon Sharon Steffens Photography soft-finned fish spring water wildlife harbor man outdoor outdoors person pier animals carapace cartilaginous nature plastron reptile reptiles rib ribs rock rocks saavem shell Testudines turtle African-dwarf-crocodile armoured-skin black-crocodile bony-crocodile broad-snouted broad-snouted-crocodile carnivore carnivorous cold-blooded crocodile Crocodilia dense-rainforest distinctive dwarf-crocodile habitat-loss nocturnal open-mouthed osteolaemus-tetraspis reptilian rough-backed-crocodile small solitary-animal vulnerable West-African zoo armor armored armorment armour armoured armourment Australian-freshwater-crocodile backstraps bony-ridges crocodylus-johnsoni danger dorsal-surface exotic fauna fresh-water-crocodile freshie hide Johnstone's-crocodile leather leathery lethargic omnivorous opportunistic opportunistic-predator osteoderms patterns powerful predator ridges rough rugged scales scutes semi-submerged skin tail tail-scutes territorial texture textured textures basking bony ridges crocodilian crocodylus-johnstoni dangerous hornback Johnston's-crocodile large