Find Compatible Fish for Your Aquarium
Discover species by tank size, temperament, and water parameters. Check compatibility before you buy. Data-driven, not guesswork.
Popular Beginner Fish
View all →
Neon Tetra
Paracheirodon innesi
Cardinal Tetra
Paracheirodon axelrodi
Ember Tetra
Hyphessobrycon amandae
Rummy Nose Tetra
Hemigrammus rhodostomus
Black Neon Tetra
Hyphessobrycon herbertaxelrodi
Serpae Tetra
Hyphessobrycon eques
Browse by Category
Best for Beginners
Hardy, forgiving fish perfect for your first aquarium. Easy to feed, tolerant of water fluctuations.
Best for 10-Gallon Tanks
Small, colorful species that thrive in nano and 10-gallon setups.
Best for 20-Gallon Tanks
Community favorites that need a bit more swimming room.
Peaceful Community Fish
Get along with everyone. Perfect for mixed community tanks.
Schooling Fish
Stunning in groups of 6+. Create movement and color in your tank.
Bottom Dwellers
Catfish, loaches, and plecos that keep the bottom of your tank clean and active.
Most Colorful Fish
Vibrant showstoppers that make your aquarium pop with color.
Low Maintenance
Feed them, do occasional water changes, and they're happy. Minimal fuss.
Cichlids
Intelligent, colorful, and full of personality. From peaceful to aggressive.
Livebearers
Guppies, mollies, platies, and swordtails. Easy breeders, vibrant colors.
Algae Eaters
Natural tank cleaners that keep algae under control.
Shrimp & Snails
Invertebrates that add variety and help with tank maintenance.
How FishRanked Works
Discover
Filter by tank size, temperament, water parameters, and difficulty level.
Check Compatibility
Verify any two species can live together before you buy. Data-driven, not forum opinions.
Compare
Put species side-by-side to see exactly how they differ in care needs.