Double lobster

[JustAnotherTheory]

Since this thread is titled "Double Lobster," I will state the most likely cause of this drawing.

The sign of Cancer is usually represented by a crab, which has the property of walking sideways, to the right and to the left. What we see in the Voynich in the sign of Cancer are two lobsters, each looking in a different direction, which represents the same idea.

The idea is that when the sun reaches the sign of Cancer, it turns around. It stops moving north and returns to the south.

That's an interesting interpretation. But then why don't more medieval manuscripts use this imagery?