Fuzzworld

The fuzzworld, which has no name until it makes contact with other worlds that habitually name things too big to see even from really far off, is a planet almost entirely covered in jungle, with swamps and rocky plateaus.

The jungle is absolutely full of life, including small things that are deadly if you ill-advisedly try to eat them, and huge things that you'd be ill-advised to give the chance to eat you.

The world is also inhabited by fuzz?, its only sapient species, who are friendly, literally fearless and horribly quick to learn.