The Iruhotaru has a streamlined body like a dolphin, covered with blue

The Iruhotaru has a streamlined body like a dolphin, covered with blue-silver scales. Each part of the body is dotted with firefly light-emitting organs, which emit a pale blue light at night. The head resembles a dolphin, with large eyes and sharp teeth. It has a dorsal fin like a dolphin on its back, and its tail fin is also dolphin-shaped. The light-emitting organs are particularly concentrated on the dorsal fin, tail fin, and sides of the body, and they create beautiful light trails as they swim. The color and pattern of the light emission varies from individual to individual, and is used to distinguish between fellow members. The fine scales reflect light and sparkle in the sea.