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 animal aquarium aquatic bulbous bulbous-growth critically-endangered elongated-snout fish-eating-crocodile freshwater gavial gavialis-gangeticus ghara Gharial hollow-bulbous-nasal-protuberance Indian-gavial Indian-gharial interdigitated-teeth long-narrow-snout long-nosed-crocodile nostril-swelling piscivorous protuberance Singapore teeth vocal-resonator water zoo armor armored armorment armour armoured armourment Australian-freshwater-crocodile backstraps bony ridges crocodylus-johnsoni crocodylus-johnstoni dorsal-surface exotic fauna freshie hide hornback Johnston's-crocodile large leather leathery omnivorous opportunistic opportunistic-predator osteoderms patterns powerful predator ridges rough rugged scutes skin tail territorial texture textured textures reflection