Because they are shy, and do not approach humans, little is known about dugong behaviour.
But the dogs around here had gone thoroughly feral, and were not approaching humans.
It is bold and curious, and often approaches humans.
Another theme is that of a dolphin which will approach humans.
The bold Caribbean reef, on the other hand, has proved more than willing to approach humans for food.
Some jumping spiders may run away from approaching humans, and others seem not to be very much afraid.
Nevertheless, their vision is quite sufficient to detect approaching humans or other large animals from some distance.
They are omnivorous and brave, often approaching humans in search of scraps of food.
It is often very tame and will approach humans closely.
I'm also sure that wild animals do not approach humans.