KDP categories · Top KDP authors
Ichthyology (Zoology, Books): Amazon KDP category data
Amazon Books Best Sellers data for Ichthyology (Zoology, Books), updated Nov 2, 2026: median price $16.99, median 26 reviews, average rating 4.6 and a KDPTop opportunity score of 30/100 (highly competitive).
| Price range (middle 50%) | $11.97 – $28.55 |
|---|---|
| Average rating | 4.6 |
| New releases (90 days) | 8% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 3% of the parent category Zoology (991), one of the easier corners under it.
- The same niche in Kindle eBooks scores 19, 11 points lower than here.
- Prices spread wide: the middle half runs from $11.97 to $28.55, so budget editions and premium or boxed sets sell side by side.
Top 10 Ichthyology best sellers
-
Scientific American September 2026
- List rank#1
- Price$6.99
- Rating4.8
- Reviews13
-
Scientific American October 2026
- List rank#2
- Price$6.99
- Rating4.2
- Reviews7
-
Scientific American November 2026
- List rank#3
- Price$6.99
- Reviews-
-
Why Fish Don't Exist: A Story of Loss, Love, and the Hidden Order of Life
by Lulu Miller
- List rank#4
- Price$13.49
- Rating4.4
- Reviews3,952
-
Peterson Field Guide to Freshwater Fishes, Second Edition (Peterson Field Guides)
by Lawrence M. Page
- List rank#5
- Price$18.25
- Rating4.7
- Reviews999
-
Axolotl Coloring Book: 40 Fun Facts about this Exotic Animals | Cute Book for Kids | Kawaii Style (Axolotl Books for Kids)
by Agnes More
- List rank#6
- Price$9.99
- Rating4.8
- Reviews415
-
What a Fish Knows: The Inner Lives of Our Underwater Cousins
by Jonathan Balcombe
- List rank#7
- Price$11.99
- Rating4.6
- Reviews868
-
The Book of Eels: Our Enduring Fascination with the Most Mysterious Creature in the Natural World ― A Natural History
by Patrik Svensson
- List rank#8
- Price$12
- Rating4.5
- Reviews1,396
-
Reef Fish Identification - Florida Caribbean Bahamas - 4th Edition (Reef Set)
by Paul Humann
- List rank#9
- Price$27.13
- Rating4.9
- Reviews658
-
Shark: The Illustrated Biography
by Daniel C. Abel
- List rank#10
- Price$17.97
- Rating4.7
- Reviews39
Same niche in Kindle eBooks: Ichthyology
FAQ
Is Ichthyology a good niche for Amazon KDP?
Its KDPTop opportunity score is 30/100, which makes it highly competitive. The median best seller has 26 reviews and sells for $16.99.
How many reviews do you need to rank in Ichthyology?
The median best seller has 26 reviews, and 66% of them have fewer than 100.
What do Ichthyology best sellers cost?
The median price is $16.99; half of the best sellers are priced between $11.97 and $28.55.
Can new books break into Ichthyology?
8% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.