One of the fish’s advantages is clear—literally. Because embryos are transparent and develop outside the mother’s body, scientists can manipulate genes to model human diseases and directly ...

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In the arid mountains of northern Oman, rocky caves hold pools of water.

Now, more than 100 labs around the world are using these transparent fish to study cancer pathology and development in real time. “The field of in vivo imaging—looking at things that are ...

When freshly caught from the water, the fish is “pink or whitish” and its fins are “usually transparent” at the ends and whiter closer to the fish’s body, Freyhof wrote. Instead of eyes ...