Aquarium Fish Database

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

Intermediate

Eight Banded False Barb

Eirmotus octozona

Adult size
up to 3.5 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
23–26 °C
Beginner – Intermediate

Eilyos Tetra

Hyphessobrycon eilyos

Adult size
up to 3 cm
Aquarium size
30 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
23–28 °C
Intermediate

Electric Blue Hap

Sciaenochromis ahli

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

Electric Blue Johanni Cichlid

Pseudotropheus johannii

Adult size
up to 10 cm
Aquarium size
200 L or larger
Temperament
Aggressive
Zone
Bottom to middle swimmer
Temp
23–28 °C
Beginner – Intermediate

Electric Yellow Cichlid

Labidochromis caeruleus

Adult size
up to 10 cm
Aquarium size
200 L or larger
Temperament
Semi-Aggressive
Zone
Bottom to middle swimmer
Temp
23–26 °C
Beginner – Intermediate

Elegant Corydoras

Corydoras elegans

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

Elegant Pencilfish

Nannostomus limatus

Adult size
up to 5 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
22–28 °C
Intermediate

Elizabeth’s Apistogramma

Apistogramma elizabethae

Adult size
up to 5 cm
Aquarium size
120 L or larger
Temperament
Semi-Aggressive
Zone
Bottom to middle swimmer
Temp
22–29 °C
Beginner – Intermediate

Emerald Betta

Betta smaragdina

Adult size
up to 7 cm
Aquarium size
120 L or larger
Temperament
Semi-Aggressive
Zone
Top swimmer
Temp
22–26 °C
Beginner – Intermediate

Emerald Brochis Corydoras

Corydoras splendens

Adult size
up to 9 cm
Aquarium size
100 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
20–27 °C
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
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