Voynich is encrypted ENOCH

[Jorge_Stolfi]

And why are there fish drawn on folio f70v2? This is the constellation of Pisces. The Moon's path in the sky follows the ecliptic (the plane of the Earth's orbit). The constellation Pisces lies directly on this path.

Pisces is a sign of the Zodiac, so of course it should appear in that section which is about the Zodiac. 

I believe you are wasting your time by trying to interpret the details of the drawings.  All of them are almost certainly decoration provided by the Scribe, with no significant contents.  The only meaningful information in each Zodiac diagram, provided by the Author in his draft, is likely to be just the rings of text, the list of 30 labels, and which sign of the Western Zodiac the diagram is supposed to be about. The sign icons in the center were probably copied by the Scribe from other books. The nymphs and stars too are likely to be his attempt at imitating similar diagrams in other books.

The overlap between the two barrels/baskets/pipes on the Pisces diagram can be explained simply by sloppiness of the Scribe (which he demonstrated in countless other drawings).

Here is what I think  happened.  The Scribe did not know hoe to divide a circle into a given number of equal parts, so he never planned the space for the nymphs.  He just started drawing the outer (last) ring of nymphs at ~11::00 o'clock and moved clockwise.  When he got at the end he found that he did not have enough space for one more nymph like the others, so he flipped it and put her barrel partly behind that of the first one.  Even so he was short of one nymph; that is why there are 29 nymphs.  Maybe he did not even notice.  When he drew the stars he miscounted and thought that he was missing two stars (actually only one), so he drew two stars in the central medallion; that is why there are 29 stars next to the nymphs but 31 in total.  Then he wrote the labels, which were provided by the Author in his draft; and after labeling the nymphs he still had one label to write, so he wrote it in the central medallion too. That is why there are 30 labels.

And the month names and the color paints are almost certainly additions by some later owner, so they are not sgnificant either.

All the best, --stolfi