Rein In, Ride On

beneath the frothy rapids along splashy river shallows, strewn with sunken rocks, crawls a delicate sand shrimp, slender and transparent, the color of colorless cellophane; having long discovered the right body tilts and moves, it is able to rein in and ride on the fastest, often swirling, flow of the invisible undercurrent, gliding to where it wants to go; but, perhaps the shrimp doesn't manipulate the current after all, perhaps it just yields to each flow and abandons its original wishes, having been convinced about what it can and cannot do !