Science of Fish · Est. 2026

The science of fish, explained simply.

How do fish breathe underwater? Why do schools shimmer? Can fish feel pain? Evidence-backed answers about fish biology, behavior, and the science of keeping them.

8Families

22Species

28Guides

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🐠 EXPLORE BY FAMILY

Fish families, documented

🐠 Osphronemidae — Bettas & Gouramis Labyrinth fish with a lung-like organ — bettas, gouramis. Southeast Asia.

🐟 Cyprinidae — Goldfish & Carps Carps and minnows — goldfish, koi, danios. The largest fish family.

🦐 Poeciliidae — Livebearers Live-bearing toothcarps — guppies, mollies, platies, swordtails.

✨ Characidae — Tetras Characins from South America — neon tetras, cardinals, hatchetfish.

🐠 Cichlidae — Cichlids Parental-care specialists — angelfish, discus, oscars, rams.

🌊 Pomacentridae — Reef Fish Damselfish & clownfish — coral reef marine species.

🧹 Callichthyidae — Armored Catfish Corydoras catfish — peaceful bottom dwellers.

🦐 Neocaridina & Invertebrates Shrimp and snails — cherry shrimp, amano, mystery snail.

📚 LATEST GUIDES

Newest science articles

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aquarium-setup

🔬 SCIENCE TOPICS

Understand the science

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Tank Setup & Cycling

The nitrogen cycle explained simply — ammonia to nitrite to nitrate, biological filtration, cycling a new tank safely, heating, lighting, water testing and what every parameter actually means for your fish.

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Beginner Guides

Your first aquarium without the guesswork — choosing the right tank size, the best starter fish, the one-inch-per-gallon stocking rule and the golden 6-week cycle.

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Feeding & Nutrition

How much, how often and what to feed your fish — feeding frequency by species, portion control, the best fish foods, frozen vs live diets, and how nutrition drives growth, color and health in aquarium fish.

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Fish Health & Diseases

Fish medicine for the home aquarium — white spot (ich), fin rot, swim bladder disorder, dropsy and parasites, with quarantine protocols and treatment-first diagnosis.

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Planted Tanks

Aquascaping science and art — substrate layers, CO2 injection, plant nutrients and light balance, plus the best beginner plants that thrive without a green thumb.

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