Fol. 189, by Illuminator E: The initial word All כל), Kol) opening the evening prayer on the Eve of the Day of Atonement is enclosed in a circle which is decorated with a red grid and blue-green flowers in every square. The circle is flanked by two semi-circles, each enclosing a fish. The letters and fish are in flaked-off silver, showing the brown ground.
It stands to reason that the fish decoration of this initial word could relate to the haftarah of the Minha of the Day of Atonement, which is read from the Book of Jonah who was swallowed by a big fish. However, since Illuminator E depicted fish in many other initial panels, it seems the fish motif is used here too as decoration only.
For similar decoration by Illuminator E, see fols. 123, 191a, 213v, 218, 239v, 250, 270v.