People have a ton of abilities. A few of us can juggle, others can play the guitar, while others can juggle guitars (presumably). Yet the majority of what we can do depends on our brains and hands. That implies that there are an entire bundle of things we'll never have the capacity to do, in the same way as tie ourselves in a tangle, melt our bodies to press through little spaces, or swallow a guitar (short of some alarming juggling mischance). Those sorts of abilities are left to different creatures, in the same way as the submerged critters here.