Cutefish Plymouth Theme
sudo mv cutefish-plymouth /usr/share/plymouth/themes
sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth default.plymouth /usr/share/plymouth/themes/cutefish-plymouth/cutefish.plymouth 100
sudo update-alternatives --config default.plymouth
Select cutefish-plymouth either 0, 1, 2, 3 ect......
sudo update-initramfs -u
Reboot.