Fish Species Care Guides: Freshwater & Saltwater

Every species guide on Sea Life Planet follows the same structure: realistic tank size and water parameter requirements, diet, tank mate compatibility, and answers to the questions that actually come up once you own the fish. Browse by category below, or use the Saltwater and Freshwater Fish sections for category-level guidance.

How to Use This Page

This page is the master index of every species profile on the site. Each guide includes a Quick Facts box (scientific name, tank size, temperament, diet, and more) near the top, followed by detailed sections on tank setup, water parameters, feeding, compatibility, and — where relevant — breeding behavior.

If you're choosing a species for a specific tank size or setup, start with the Quick Facts box on each guide to quickly rule fish in or out before reading the full profile.

All Species Guides

Saltwater Fish

Yellowtail damselfish (Chrysiptera parasema) swimming over live rock in a reef aquarium
Saltwater Fish

Yellowtail Damselfish Care Guide: Tank Setup, Diet & Breeding

A hardy, vividly colored beginner reef fish — here's how to set up its tank, feed it correctly, and what to expect if it spawns.
Pair of common clownfish (Amphiprion ocellaris) swimming near a host anemone
Saltwater Fish

Common Clownfish Care Guide: Tank Size, Diet, Tank Mates & Anemones

The fish that made reef keeping mainstream — here's how to set up its tank, what it actually eats, and why it doesn't need an anemone to thrive.
Firefish goby (Nemateleotris magnifica) hovering near a rock crevice with its dorsal fin raised
Saltwater Fish

Firefish Goby Care Guide: Tank Setup, Jumping Risk & Tank Mates

A peaceful, strikingly colored reef fish with one well-known quirk: a tendency to jump out of open tanks. Here's how to keep one safely.

Freshwater Fish

Vibrant red and blue veiltail betta fish flaring its fins in a planted aquarium
Freshwater Fish

Betta Fish Care Guide: Tank Size, Water Temperature & Tank Mates

Bettas are sold as 'low maintenance,' but a healthy betta needs more than a bowl. Here's what tank size, heating, and filtration actually look like in practice.