Robin and the Honey Badger's mission is to recharge biology with originality for you, the non-specialist reader. Exploring the Bio-edge is a series of e-essays presenting lateral thoughts in search of ever more interesting stories from biology. In this e-essay: we show what it looks like when hips are swapped for pecs, hindfins become forefins, and vents really become ventral. Although readers may be unaccustomed to hearing the words 'pelvis' and 'fish' uttered in one breath, the pelvic structures of fishes actually invite one of the smoothest entry-points into the otherwise bewildering diversity of bony fishes. We challenge you to think as laterally as you can – both literally and figuratively – as we engage in mental intimacy with a hitherto virginal aspect of fish biology.

Each morning Robin and the Honey Badger wake up to a world of Nature with new curiosity. Which aspects of the natural world have been underlooked? Which adaptations or non-adaptations of organisms have been downplayed because of some theoretical bias? Which observations have yet to be integrated because of interdisciplinary timidity? How laterally can we think as we cruise the bewildering diversity of life forms on Earth? Join us in our mission of Exploring the Bio-edge in a series of e-essays that fearlessly - but accurately - cover all corners of biology.