Axel Scheffler has hidden a Gruffalo in most of his works with Julia Donaldson, which have been mirrored in the adaptations. In this, the Gruffalo can be seen as a decoration on the King's bed frame.
While the doctors are tending to the mermaid, Zog can be seen playing with the the snail from 'The Snail And The Whale' (2019).