角鲨（Squalus acanthias）对酚红的溴化作用。

Science. 1959 Mar 20;129(3351):778-9. doi: 10.1126/science.129.3351.778.

The uterus of the pregnant spiny dogfish, Squalus acanthias, can convert phenol red into a new purplish-blue dye. Evidence shows that the new dye is bromophenol blue. This is the first example of biological bromination that has been observed in a vertebrate.

怀孕的白斑角鲨（Squalus acanthias）的子宫能将酚红转化为一种新的紫蓝色染料。证据表明，这种新染料是溴酚蓝。这是在脊椎动物中观察到的生物溴化作用的首个实例。