Concept: Step Devil
This microscopic iridescent critter, member of the drake family, never developed wings due to its obsession to climb and fall. Invisible to the naked eye, features an extended set of gills and unmatched dexterity that allows it to climb to the heights of the stratosphere by stepping on falling rain drops. When desired height is reached, it will free fall using its tail to steer and his gills as flaps. A living bullet with a rock-hard skull, lethal to young fish and invisible to larger predators, often self-implants his body a few millimeters under the skin of large fish, stowaway in search for new territory.
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