KDP categories · Top KDP authors
Fish & Aquariums (Animal Care & Pets, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Fish & Aquariums (Animal Care & Pets, Kindle eBooks), updated Nov 2, 2026: median price $5.70, median 14 reviews, average rating 4.4 and a KDPTop opportunity score of 21/100 (highly competitive).
| Price range (middle 50%) | $2.99 – $9.99 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 6% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 2% of the parent category Animal Care & Pets (852), one of the easier corners under it.
- The same niche in Books scores 34, 13 points higher than here; worth checking both.
- Its review barrier is lower than in 78% of Kindle eBooks categories: the median best seller has only 14 reviews, so new books can chart with few.
Top 10 Fish & Aquariums best sellers
-
Reef Aquariums: Learn the Ins and Outs to Set Up Your Tank for Success
by Anthony Daniels
- List rank#1
- Price$2.99
- Rating4.4
- Reviews95
-
Aquaponic Gardening: A Step-by-Step Guide to Raising Vegetables and Fish Together (Mother Earth News Books for Wiser Living)
by Sylvia Bernstein
- List rank#2
- Price$11.99
- Rating4.6
- Reviews1,462
-
Aquascaping: A Step-by-Step Guide to Planting, Styling, and Maintaining Beautiful Aquariums
by George Farmer
- List rank#3
- Price$12.99
- Rating4.7
- Reviews1,275
-
Betta Fish: The Simple Guide to Caring for Your Magical Betta
by Walter James
- List rank#4
- Price$4.99
- Rating4.5
- Reviews469
-
The Betta Bible: The Art and Science of Keeping Bettas
by Martin Brammah
- List rank#5
- Price$9.99
- Rating4.6
- Reviews358
-
The New Saltwater Aquarium Guide: How to Care for and Keep Marine Fish and Corals (Reef Aquarium Book Series 1)
by Albert B. Ulrich III
- List rank#6
- Price$7.95
- Rating4.4
- Reviews248
-
Mastering Aquascaping for First-Time Hobbyists: Step-by-step guide for freshwater aquarium builds with visual layout ideas, maintenance schedules and practical tools for your first planted tank
by Evan Brookstone
- List rank#7
- Price$9.99
- Rating4.8
- Reviews41
-
Community Aquarium Fish for Beginners: The Complete Guide to Compatible Freshwater Tank Mates — Sizes, Temperaments, and Water Parameters for Guppies, Tetras, Corydoras, and Betta, With Real Photos
by J. L. Cruz
- List rank#8
- Price$3.99
- Reviews-
-
Betta Fish: Your Complete Guide to Ensure You Give Your Betta the Best Life Possible
by Anthony Daniels
- List rank#9
- Price$2.99
- Rating4.4
- Reviews190
-
The Shrimp Tank: A Complete Beginner's Guide to Neocaridina Setup, Water Chemistry, and Building a Thriving Colony (Aquarium Library Book 2)
by Lena Lawson
- List rank#10
- Price$6.99
- Rating5.0
- Reviews2
Same niche in Books: Fish & Aquariums
FAQ
Is Fish & Aquariums a good niche for Amazon KDP?
Its KDPTop opportunity score is 21/100, which makes it highly competitive. The median best seller has 14 reviews and sells for $5.70.
How many reviews do you need to rank in Fish & Aquariums?
The median best seller has 14 reviews, and 75% of them have fewer than 100.
What do Fish & Aquariums best sellers cost?
The median price is $5.70; half of the best sellers are priced between $2.99 and $9.99.
Can new books break into Fish & Aquariums?
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.