african aggressive bask basking carnivore carnivorous cold-blooded coldblooded croc crock crocodile crocodiles crocodilian danger dangerous deadly hazardous jaws lethargic lifeless maneatting menacing reptile reptiles reptilian riverbank scales scaly tears threatening toothy ugly untrustworthy wild algal-forager amblyrhynchus-cristatus black color colored colors colour coloured colours crest-of-spines forage forager graceful-swimmer heat-absorption Iguana large lethargy lizard long-sharp-claws marine-iguana marine-reptile salt salty sea spikes spiky spiky-dorsal-fin subtidal-algae-forager sun-absorption Sunbather armor armored armorment armour armoured armourment Australian-freshwater-crocodile backstraps bony-ridges crocodylus-johnsoni dorsal-surface exotic fauna fresh-water-crocodile freshie hide Johnstone's-crocodile leather leathery omnivorous opportunistic opportunistic-predator osteoderms patterns powerful predator ridges rough rugged scutes semi-submerged skin tail tail-scutes territorial texture textured textures bony ridges crocodylus-johnstoni hornback Johnston's-crocodile reflection crocodylus-porosus estuarine-crocodile huge Indo-Pacific-crocodile largest-reptile saltwater-crocodile