Fish directory

Profiles with adult tank sizes, temperament, and FAQs. Filter by water type or difficulty.

Showing 4 species · Beginner

Freshwater · Beginner

Betta

Betta splendens

Bettas are labyrinth fish that breathe from the surface, but they still need a heated, filtered aquarium, not a vase. A 5-gallon tank is a minimum for a single male.

Min. tank: 5 gal

Care notes →

Freshwater · Beginner

Neon tetra

Paracheirodon innesi

Neon tetras are small Amazonian schoolers that look their best in a planted 10-gallon (or larger) tank with a proper group, dimmer light, and stable, clean water.

Min. tank: 10 gal

Care notes →

Freshwater · Beginner

Guppy

Poecilia reticulata

Guppies are colorful, active livebearers for a heated 10-gallon (or larger) community, with one caveat: mixed sexes will produce fry, often lots of them.

Min. tank: 10 gal

Care notes →

Freshwater · Beginner

Peppered cory

Corydoras paleatus

Peppered corydoras are social, sandy-bottom catfish. Keep a group of six or more in a 20-gallon tank with sand, not gravel that can nick their barbels.

Min. tank: 20 gal

Care notes →