KDP categories · Top KDP authors
Marine Life (Oceans & Seas, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Marine Life (Oceans & Seas, Kindle eBooks), updated Nov 2, 2026: median price $10.99, median 116 reviews, average rating 4.5 and a KDPTop opportunity score of 22/100 (highly competitive).
| Price range (middle 50%) | $4.99 – $13.99 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 4% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- At $10.99 its median price beats 90% of Kindle eBooks categories, leaving more margin per copy.
- Only 4% of its best sellers are under 90 days old, fewer than in 82% of Kindle eBooks categories: established titles hold the list.
- Prices spread wide: the middle half runs from $4.99 to $13.99, so budget editions and premium or boxed sets sell side by side.
Top 10 Marine Life best sellers
-
In the Heart of the Sea: The Tragedy of the Whaleship Essex (National Book Award Winner)
- List rank#1
- Price$14.99
- Rating4.5
- Reviews8,071
-
The Soul of an Octopus: A Surprising Exploration into the Wonder of Consciousness
- List rank#2
- Price$13.99
- Rating4.6
- Reviews11,212
-
Other Minds: The Octopus, the Sea, and the Deep Origins of Consciousness
by Peter Godfrey-Smith
- List rank#3
- Price$12.99
- Rating4.4
- Reviews5,856
-
Monarchs of the Sea: The Extraordinary 500-Million-Year History of Cephalopods
by Danna Staaf
- List rank#4
- Price$3.99
- Rating4.7
- Reviews281
-
The Place of Tides: A Transformative Nature Memoir of Isolation, Forgiveness, and Self-Discovery on a Remote Norwegian Island
by James Rebanks
- List rank#5
- Price$19.99
- Rating4.6
- Reviews1,329
-
Close to Shore: The Terrifying Shark Attacks of 1916
by Michael Capuzzo
- List rank#6
- Price$8.99
- Rating4.3
- Reviews1,458
-
Of Orcas and Men: What Killer Whales Can Teach Us
by David Neiwert
- List rank#7
- Price$9.99
- Rating4.6
- Reviews315
-
The Whale Warriors: The Battle at the Bottom of the World to Save the Planet's Largest Mammals (An Antarctic Sea Adventure)
by Peter Heller
- List rank#8
- Price$14.99
- Rating4.4
- Reviews224
-
Spineless: Portraits of Marine Invertebrates, the Backbone of Life
by Susan Middleton
- List rank#9
- Price$2.99
- Rating4.8
- Reviews119
-
The Ocean Book: The Stories, Science, and History of Oceans (DK Nature Books)
by DK
- List rank#10
- Price$14.99
- Rating4.8
- Reviews81
Same niche in Books: Marine Life
FAQ
Is Marine Life a good niche for Amazon KDP?
Its KDPTop opportunity score is 22/100, which makes it highly competitive. The median best seller has 116 reviews and sells for $10.99.
How many reviews do you need to rank in Marine Life?
The median best seller has 116 reviews, and 47% of them have fewer than 100.
What do Marine Life best sellers cost?
The median price is $10.99; half of the best sellers are priced between $4.99 and $13.99.
Can new books break into Marine Life?
4% 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.