Tropical Fish Encyclopedia — 71 Species Directory
Encyclopedia of popular tropical fish species with care guides, traits, and water parameters.
Featured Tropical Fish
Showing 3 of 71 species

Bristlenose Pleco
A small pleco with distinctive bristle-like growths around the mouth. Popular tank cleaner with strong algae-eating ability.
BristlenoseAlgae eaterCleaner
© CHUCAO / CC BY-SA 3.0Otocinclus
Small catfish that eats algae on glass and plants. Peaceful and essential for planted tanks. More secure in groups.
Algae eaterSmallPeaceful
© User:Ark pl wiki / CC BY 3.0Siamese Algae Eater
One of few fish that eats black beard algae. Valued for planted tank algae control. Becomes somewhat aggressive when mature.
Algae eaterBlack beard algaePlanted tank
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Tropical Fish FAQ
- Can beginners keep tropical fish?
- Guppies, neon tetras, and corydoras are hardy and perfect for beginners. They can be kept in small tanks, and as long as you manage water temperature, it's relatively easy to get started.
- How much do tropical fish cost?
- Neon tetras cost 100-300 yen each, guppies 300-2,000 yen, bettas 1,000-10,000 yen, and premium discus 5,000-50,000+ yen depending on the species.
- How long do tropical fish live?
- Small tetras live 2-5 years, guppies 1-2 years, corydoras 5-10 years, and discus 10+ years, varying greatly by species.
- What's the minimum equipment needed?
- You'll need a tank, heater, filter, light, and water conditioner at minimum. A 30cm tank can house 5-10 small fish and doesn't take much space.
- What should I check when buying tropical fish?
- Check for vivid coloring, active swimming, and no signs of disease like ich. After purchase, acclimate carefully and avoid sudden temperature changes.