A large number of living creatures are able to use ambient light effectively in biological signalling. Atherinomorus lacunosus, a teleost fish has alignments of circular spots on its dorsal trunk. The spot consists of iridophores, whose diameters are approximately 7–10 µm. The iridophore contains guanine crystals with diameters of 1–3 µm. Here, it is found that more than one spot with a diameter of approximately 0.1 mm causes a rhythmic flashing of light when viewed under white light. The typical light flash has a pulse width of approximately one second. When a pulsed train of flashes appears, the flash repeats at a typical frequency of 0.5–1 Hz. The observed phenomenon is one example of the evidence for the existence of rapid colour changing teleost fish.

许多生物能够在生物信号中有效地利用环境光。 Atherinomorus lacunosus是一种硬骨鱼，其背干上有排列的圆形斑点。该斑点由虹彩细胞组成，其直径约为 7-10 µm。虹彩细胞含有直径为 1-3 µm 的鸟嘌呤晶体。在这里，我们发现，在白光下观察时，超过一个直径约为0.1毫米的光点会产生有节奏的闪光。典型的闪光具有大约一秒的脉冲宽度。当脉冲闪光序列出现时，闪光会以 0.5-1 Hz 的典型频率重复。观察到的现象是存在快速变色硬骨鱼的证据之一。