Off the coast of Costa Rica, at a depth of 321 meters, the school of cutlassfish hung suspended in the water column. Bright light glinted off of their shining scales, creating scintillating patterns of pink and green against the deep blue of the tropical ocean. As they glistened and drifted, spiral fins undulating to keep them held in place, occasionally one would dart in or out, creating flashes of silver which sent ripples through the array

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