Voracious fish are noisy eaters and emit a loud roar anytime they approach their meal, assuming they are hungry. Voracious fish make a distinct "gulp" sound once they eat. Rocky - Rocky is a voracious guppy that eats ultravores and roars when he eats. Kilgore - Although not explicitly known for roaring, Kilgore is a musical genius that roars very briefly when he eats while singing.