KDP categories · Top KDP authors
Fish & Aquariums (Pets & Animal Care, Books): Amazon KDP category data
Amazon Books Best Sellers data for Fish & Aquariums (Pets & Animal Care, Books), updated Nov 3, 2026: median price $16.70, median 12 reviews, average rating 4.4 and a KDPTop opportunity score of 34/100 (highly competitive).
| Price range (middle 50%) | $12.86 – $21.97 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 7% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 2% of the parent category Pets & Animal Care (706), one of the easier corners under it.
- The same niche in Kindle eBooks scores 21, 13 points lower than here.
- Its review barrier is lower than in 81% of Books categories: the median best seller has only 12 reviews, so new books can chart with few.
Top 10 Fish & Aquariums best sellers
-
Axolotl Fact Book for Kids: Fascinating Facts You've Never Heard About the World's Most Interesting Amphibian: Axolotl Salamander Books for Kids (Axolotl Books)
- List rank#1
- Price$10.99
- Rating4.6
- Reviews736
-
Aquascaping: A Step-by-Step Guide to Planting, Styling, and Maintaining Beautiful Aquariums
by George Farmer
- List rank#2
- Price$18.96
- Rating4.7
- Reviews1,275
-
500 Freshwater Aquarium Fish: A Visual Reference to the Most Popular Species
by Greg Jennings
- List rank#3
- Price$18.99
- Rating4.6
- Reviews974
-
Ecology of the Planted Aquarium: A Practical Manual and Scientific Treatise
by Diana Walstad
- List rank#4
- Price$25.52
- Rating4.7
- Reviews1,418
-
My First Fish Tank: A Step-by-Step Guide for Kids to Amazing Aquarium Adventures (Aquarium Adventures for Kids)
by Denise Melcher
- List rank#5
- Price$12.95
- Rating4.7
- Reviews35
-
The Betta Bible: The Art and Science of Keeping Bettas
by Dr Martin Brammah
- List rank#6
- Price$30.77
- Rating4.6
- Reviews358
-
Mastering Saltwater Aquariums for First-Time Hobbyists: Set Up Your First Tank with Fish and Coral Guides, Practical Checklists, and Beginner-Friendly Chemistry Without Confusing Online Research
by Evan Brookstone
- List rank#7
- Price$20.99
- Rating4.4
- Reviews62
-
The betta fish book: A complete guide on betta fish care, the tank, habitat, diet, breeding, diseases, buying and all more informations about this fabulous fish
by Aqua Health
- List rank#8
- Price$12.99
- Rating4.5
- Reviews71
-
Freshwater Aquariums (CompanionHouse Books) Essential Beginner-Friendly Guide to Setting Up Your Tank, Filtration, Health, Fish, Plants, Substrates, Lighting, and More (Aquamaster)
by Stuart Thraves
- List rank#9
- Price$9.99
- Rating4.4
- Reviews402
-
Encyclopedia of Aquarium and Pond Fish (DK Pet Encyclopedias)
by David Alderton
- List rank#10
- Price$17.99
- Rating4.7
- Reviews651
Same niche in Kindle eBooks: Fish & Aquariums
FAQ
Is Fish & Aquariums a good niche for Amazon KDP?
Its KDPTop opportunity score is 34/100, which makes it highly competitive. The median best seller has 12 reviews and sells for $16.70.
How many reviews do you need to rank in Fish & Aquariums?
The median best seller has 12 reviews, and 74% of them have fewer than 100.
What do Fish & Aquariums best sellers cost?
The median price is $16.70; half of the best sellers are priced between $12.86 and $21.97.
Can new books break into Fish & Aquariums?
7% 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.