hippopotamus, hippo, river horse, Hippopotamus amphibius
['howler monkey, howler', 'koala, koala bear, kangaroo bear, native bear, Phascolarctos cinereus', 'giant panda, panda, panda bear, coon bear, Ailuropoda melanoleuca', 'sea cucumber, holothurian', 'otter', 'frilled lizard, Chlamydosaurus kingi', 'mongoose']