$(6$ points$)$ A fish swims through industrial pollution and acquires a thin layer of magnesium fluoride on its scales approximately $0\mathrm{.}5m$ thick. Deep sea creatures are very sensitive to blue light $(455$ nm $),$ but have trouble seeing other wavelengths. Will other deep sea creatures be able to see the fish? $($Note: Use $n_{\text{f}\text{i}\text{s}\text{h}\text{s}\text{c}\text{a}\text{l}\text{e}}$ is very large, $n_{\text{m}\text{a}\text{g}\text{n}\text{e}\text{s}\text{i}\text{u}\text{m}\text{f}\text{l}\text{u}\text{o}\text{r}\text{i}\text{d}\text{e}}=1\mathrm{.}38,$ and $n_{\text{w}\text{a}\text{t}\text{e}\text{r}}=1\mathrm{.}333.)$