Oops, I should have quoted this part, from the summary: Knocking out TDO in squid embryos efficiently eliminated pigmentation. By precisely timing CRISPR-Cas9

Oops, I should have quoted this part, from the summary: Knocking out TDO in squid embryos efficiently eliminated pigmentation. By precisely timing CRISPR-Cas9 delivery during early development, the degree of pigmentation could be finely controlled.