they have volcanoes and all that kind of nuisance quite as badly as we have ) and blow up somebody 's prize flock of goldfish , or prize bed of anemones , or one and only pearl-oyster , or famous rock and coral garden ; or savage fish have a fight in the highway and knock mer-children over ; or absent-minded sharks swim in at the dining-room window and spoil the dinner ; or the deep , dark , unmentionable monsters of the black abysses do horrible and wicked things .