Aquarium Fish Database

Explore freshwater aquarium fish by care level, size, temperament, swimming zone, water parameters, and compatibility.

Beginner – Intermediate

Emerald Dwarf Danio

Danio erythromicron

Adult size
up to 4 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
20–25 °C
Beginner – Intermediate

Emerald Eye Rasbora

Brevibora dorsiocellata

Adult size
up to 3.5 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
22–26 °C
Beginner – Intermediate

Emperor Loach

Botia udomritthiruji

Adult size
up to 15 cm
Aquarium size
160 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
23–28 °C
Beginner

Emperor Tetra

Nematobrycon palmeri

Adult size
up to 4.5 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
22–26 °C
Beginner – Intermediate

Empire Gudgeon

Hypseleotris compressa

Adult size
up to 12 cm
Aquarium size
100 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
20–35 °C
Beginner – Intermediate

Ethereal Danio

Danionella cerebrum

Adult size
up to 1.4 cm
Aquarium size
30 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
22–30 °C
Beginner – Intermediate

Eurasian Minnow

Phoxinus phoxinus

Adult size
up to 10 cm
Aquarium size
120 L or larger
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
11–20 °C
Intermediate

Eureka Red Peacock Cichlid

Aulonocara jacobfreibergi eureka

Adult size
up to 15 cm
Aquarium size
200 L or larger
Temperament
Semi-Aggressive
Zone
Bottom to middle swimmer
Temp
23–28 °C
Beginner – Intermediate

European Bitterling

Rhodeus amarus

Adult size
up to 10 cm
Aquarium size
120 L or larger
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
12–21 °C
Beginner – Intermediate

European Bullhead Goby

Cottus gobio

Adult size
up to 10 cm
Aquarium size
120 L or larger
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
2–20 °C
Beginner

Eversi Corydoras

Corydoras eversi

Adult size
up to 5.5 cm
Aquarium size
60 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
21–25 °C
Intermediate

Exclamation Mark Tetra

Bryconella pallidifrons

Adult size
up to 3.5 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
25–27 °C
Beginner – Intermediate

Exclamation Point Rasbora

Boraras urophthalmoides

Adult size
up to 2 cm
Aquarium size
30 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
24–27 °C
Beginner – Intermediate

Exquisite Rainbowfish

Melanotaenia exquisita

Adult size
up to 9 cm
Aquarium size
120 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
24–30 °C
Advanced

Fahaka Pufferfish

Tetraodon lineatus

Adult size
up to 45 cm
Aquarium size
900 L or larger
Temperament
Aggressive
Temp
22–26 °C
Beginner – Intermediate

Fairy Cichlid

Neolamprologus brichardi

Adult size
up to 9 cm
Aquarium size
200 L or larger
Temperament
Semi-Aggressive
Temp
23–26 °C
Beginner – Intermediate

Fairy Corydoras

Corydoras atropersonatus

Adult size
up to 5 cm
Aquarium size
60 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
21.1–23.9 °C
Beginner – Intermediate

False Bandit Corydoras

Corydoras melini

Adult size
up to 5 cm
Aquarium size
60 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
22–26 °C
Beginner – Intermediate

False Giant Danio

Devario affinis

Adult size
up to 8 cm
Aquarium size
120 L or larger
Temperament
Semi-Aggressive
Zone
Middle swimmer
Temp
22–27 °C
Intermediate – Advanced

False Green Terror

Andinoacara rivulatus

Adult size
up to 30 cm
Aquarium size
300 L or larger
Temperament
Aggressive
Zone
Middle swimmer
Temp
20–24 °C
Beginner – Intermediate

False Network Corydoras

Corydoras sodalis

Adult size
up to 5 cm
Aquarium size
60 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
22–26 °C
Beginner – Intermediate

False Siamese Algae Eater

Garra cambodgiensis

Adult size
up to 15 cm
Aquarium size
160 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
20–26 °C
Intermediate

False Tiger Knifefish

Gymnotus javari

Adult size
up to 20 cm
Aquarium size
240 L or larger
Temperament
Semi-Aggressive
Zone
Bottom dweller
Temp
24–28 °C
Intermediate

Featherfin Catfish

Synodontis eupterus

Adult size
up to 30 cm
Aquarium size
300 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
22–27 °C
Scroll to Top