KDP categories · Top KDP authors
Coral Reefs: Amazon KDP category data
Amazon Books Best Sellers data for Coral Reefs, updated Nov 2, 2026: median price $14.56, median 6 reviews, average rating 4.4 and a KDPTop opportunity score of 23/100 (highly competitive).
| Price range (middle 50%) | $10.33 – $33.74 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 3% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 1% of the parent category Ecosystems (518), one of the easier corners under it.
- Its review barrier is lower than in 89% of Books categories: the median best seller has only 6 reviews, so new books can chart with few.
- Only 3% of its best sellers are under 90 days old, fewer than in 88% of Books categories: established titles hold the list.
Top 10 Coral Reefs best sellers
-
Reef Fish Identification Tropical Pacific 2nd Edition
by Paul Humann
- List rank#1
- Price$39.41
- Rating4.8
- Reviews239
-
Reef Fish Identification: Baja to Panama
by Paul Humann
- List rank#2
- Price$31.99
- Rating4.8
- Reviews110
-
Reef Coral Identification: Florida, Caribbean, Bahamas 3rd Edition (Reef Set (New World))
by Paul Humann
- List rank#3
- Price$34.78
- Rating4.8
- Reviews194
-
Beach Cats 2: Relaxing Cute Coloring Book for Adults and Teens with Kawaii Cats & Cozy Animal Characters Exploring Under the Sea Life & Mythical Lost Ocean Treasures (Hygge Moments Easy Art Therapy)
by Cuddlefish
- List rank#4
- Price$9.99
- Rating5.0
- Reviews6
-
Reef Creature Identification Tropical Pacific
by Paul Humann
- List rank#5
- Price$34.14
- Rating4.8
- Reviews225
-
Dive Atlas of the World, Revised and Expanded Edition: An Illustrated Reference to the Best Sites (IMM Lifestyle Books) Wrecks, Walls, Caves, and Blue Holes from the Red Sea to the Great Barrier Reef
by Jack Jackson
- List rank#6
- Price$50
- Rating4.7
- Reviews27
-
Oceanic Serenity: An Adult And Teen Coloring Adventure: Ocean Life, Sea Life, Underwater Coloring Book For Adults And Teens
by ApexLit Publishing
- List rank#7
- Price$10.99
- Rating5.0
- Reviews1
-
Reef Life: An Underwater Memoir
by Callum Roberts
- List rank#8
- Price$11.99
- Rating4.6
- Reviews76
-
Reef Creature Identification - Florida Caribbean Bahamas - 3rd Edition (Reef Set (New World))
by Paul Humann
- List rank#9
- Price$41.89
- Rating4.9
- Reviews267
-
The Ultimate Ocean Facts for Kids, Teens, & Adults: Dive Into Underwater Wonders, Discover Mind-Blowing Creatures, Phenomena, Records, Inventions, and ... of the Deep! (Eleven Worlds to Explore)
by Ethereal Ray
- List rank#10
- Price$12.99
- Rating4.5
- Reviews148
FAQ
Is Coral Reefs a good niche for Amazon KDP?
Its KDPTop opportunity score is 23/100, which makes it highly competitive. The median best seller has 6 reviews and sells for $14.56.
How many reviews do you need to rank in Coral Reefs?
The median best seller has 6 reviews, and 85% of them have fewer than 100.
What do Coral Reefs best sellers cost?
The median price is $14.56; half of the best sellers are priced between $10.33 and $33.74.
Can new books break into Coral Reefs?
3% 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.