Are there any seeded animals on Level 172?

No. The first decoded frame has no seeded animal or opening white X; all nine animals are placed during the recorded route.

Which pink cell is correct on Level 172?

Use r5c4. The upper pink r4c3 is the visible red failed probe and should remain untouched.

The ninth animal is placed at r1c1 in the purple territory, completing Perfect with one heart remaining.

Zoodoku level guide

expert 9 colors

Zoodoku Level 172 is an unseeded 9x9 animal board; follow r6c2, r7c9, r2c6, r5c4, r3c3, r4c8, r8c7, r9c5, and r1c1 while avoiding red r4c3.

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Place the first animal at r6c2 in the light-green territory; this starts the visible white X propagation.
Place the second animal at r7c9 in the yellow territory.
Place the third animal at r2c6 in the teal territory.
Skip red-probed r4c3, then place the fourth animal at r5c4 in the pink territory.
Place the fifth animal at r3c3 in the brown territory.
Place the sixth animal at r4c8 in the dark-magenta territory.
Place the seventh animal at r8c7 in the green territory.
Place the eighth animal at r9c5 in the light-blue territory.
Finish with the ninth animal at r1c1 in the purple territory, then confirm Perfect.

Colors in this level:

Light-green, Yellow, Teal, Pink, Brown, Dark-magenta, Green, Light-blue, Purple

Do not tap r4c3: the source records it as a red failed pink probe before the accepted r5c4 placement.
Do not replace the isolated light-green r6c2 opening with another lower-left light-blue cell; r6c2 is the first accepted target.

Start with light-green r6c2, then yellow r7c9 and teal r2c6 before taking pink r5c4; do not use red r4c3.
The verified close is dark-magenta r4c8, green r8c7, light-blue r9c5, then purple r1c1.

Board notes 5 details

Layout: The 9x9 opening has a purple top field, brown and teal pockets in the upper middle, pink and dark-magenta bands through the center, green on the right, and light-blue/yellow anchors across the lower rows.
Goal: Place nine animals in the verified source order r6c2, r7c9, r2c6, r5c4, r3c3, r4c8, r8c7, r9c5, and r1c1, using each territory once.
Opening: The first decoded frame has no seeded animal and no opening X. Accepted r6c2 starts white X propagation; the late source close is r8c7, r9c5, then r1c1.
Danger Zone: Red r4c3 is a failed pink probe; the accepted pink target is r5c4. The red mark remains distinct from the white propagated X marks.
Mechanics: This is an unseeded nine-animal 9x9 board with isolated light-green, yellow, and teal targets and one visible red probe; the final capture shows Perfect and one heart remaining in the HUD.

Are there any seeded animals on Level 172?
No. The first decoded frame has no seeded animal or opening white X; all nine animals are placed during the recorded route.
Which pink cell is correct on Level 172?
Use r5c4. The upper pink r4c3 is the visible red failed probe and should remain untouched.
What is the final Level 172 placement?
The ninth animal is placed at r1c1 in the purple territory, completing Perfect with one heart remaining.