KDP categories · Top KDP authors
Marine Biology (Oceans & Seas, Books): Amazon KDP category data
Amazon Books Best Sellers data for Marine Biology (Oceans & Seas, Books), updated Nov 2, 2026: median price $16.74, median 177 reviews, average rating 4.6 and a KDPTop opportunity score of 28/100 (highly competitive).
| Price range (middle 50%) | $13.05 – $24.99 |
|---|---|
| Average rating | 4.6 |
| New releases (90 days) | 6% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 37% of the parent category Oceans & Seas (472), one of the easier corners under it.
Top 10 Marine Biology best sellers
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The Soul of an Octopus: A Surprising Exploration into the Wonder of Consciousness
- List rank#2
- Price$10.48
- Rating4.6
- Reviews11,212
-
Scientific American September 2026
- List rank#3
- Price$6.99
- Rating4.8
- Reviews13
-
Scientific American October 2026
- List rank#4
- Price$6.99
- Rating4.2
- Reviews7
-
Scientific American June 2026
- List rank#5
- Price$6.99
- Rating4.4
- Reviews42
-
The Log from the Sea of Cortez (Penguin Classics)
- List rank#6
- Price$11.99
- Rating4.5
- Reviews1,060
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Oceanology: The Secrets of the Sea Revealed (DK Secret World Encyclopedias)
by DK
- List rank#7
- Price$30.30
- Rating4.9
- Reviews1,294
-
Scientific American November 2026
- List rank#8
- Price$6.99
- Reviews-
-
Deep: Freediving, Renegade Science, and What the Ocean Tells Us About Ourselves
by James Nestor
- List rank#9
- Price$10.09
- Rating4.7
- Reviews3,111
-
Of Time and Turtles: Mending the World, Shell by Shattered Shell―A Heartwarming Compassionate Portrait of Injured Turtles, Perfect for Nature Lovers.
- List rank#10
- Price$15
- Rating4.6
- Reviews541
Same niche in Kindle eBooks: Marine Biology
FAQ
Is Marine Biology a good niche for Amazon KDP?
Its KDPTop opportunity score is 28/100, which makes it highly competitive. The median best seller has 177 reviews and sells for $16.74.
How many reviews do you need to rank in Marine Biology?
The median best seller has 177 reviews, and 34% of them have fewer than 100.
What do Marine Biology best sellers cost?
The median price is $16.74; half of the best sellers are priced between $13.05 and $24.99.
Can new books break into Marine Biology?
6% 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.