Female zebrafish stock up their eggs with a supply of a compound that acts as a sunscreen to protect their young from UV light as they develop.
Female zebrafish stock up their eggs with a supply of a compound that acts as a sunscreenZebrafish eggs contain a sunscreen called gadusol that protects the growing embryo from harmful rays.
The ultraviolet rays in sunlight are damaging. To shield against this, vertebrates produce a pigment called melanin. In aquatic vertebrates, like fish, melanin is produced by cells called melanophores. But melanophores appear late in embryonic development, so it wasn’t known what protects vulnerable fish embryos before this point.
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