These yellowtail seemed so regimented into their 'march on by' that I could not help but imagine they had been given their marching orders.
Although this looks like a night shot it was actually created in full daylight by using a combination of bright strobe lighting to 'drown out the daylight' and then pulling back the blue luminescence in post production. The result is this striking black and silver contrast between fish and water.
March on by.
Photo: Robert Rath, 'Marching Orders' 1/50s f/3.5 ISO160 50mm