Aquarium Fish Database

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

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Fahaka Pufferfish

Tetraodon lineatus

Adult size
≤ 17.7" (≤ 45 cm)
Aquarium size
145 US gal (550 L) or larger / ≥ 70.9" (≥ 180 cm) minimum length
Temperament
Aggressive
Temp
72–79°F (22–26°C)
Beginner – Intermediate

Fairy Cichlid

Neolamprologus brichardi

Adult size
≤ 3.5" (≤ 9 cm)
Aquarium size
53 US gal (200 L) or larger / ≥ 39.4" (≥ 100 cm) minimum length
Temperament
Semi-Aggressive
Temp
73–79°F (23–26°C)
Beginner – Intermediate

Fairy Corydoras

Corydoras atropersonatus

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
21 US gal (80 L) or larger / ≥ 19.7" (≥ 50 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
70–75°F (21.1–23.9°C)
Beginner – Intermediate

False Bandit Corydoras

Hoplisoma melini

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
21 US gal (80 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
72–79°F (22–26°C)
Beginner – Intermediate

False Giant Danio

Devario affinis

Adult size
≤ 3.1" (≤ 8 cm)
Aquarium size
64 US gal (243 L) or larger / ≥ 47.2" (≥ 120 cm) minimum length
Temperament
Semi-Aggressive
Zone
Middle swimmer
Temp
72–81°F (22–27°C)
Intermediate – Advanced

False Green Terror

Andinoacara rivulatus

Adult size
≤ 11.8" (≤ 30 cm)
Aquarium size
119 US gal (450 L) or larger / ≥ 59.1" (≥ 150 cm) minimum length
Temperament
Aggressive
Zone
Middle swimmer
Temp
68–75°F (20–24°C)
Beginner – Intermediate

False Network Corydoras

Brochis sodalis

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
24 US gal (90 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
72–79°F (22–26°C)
Beginner – Intermediate

False Siamese Algae Eater

Ceratogarra cambodgiensis

Adult size
≤ 5.9" (≤ 15 cm)
Aquarium size
79 US gal (300 L) or larger / ≥ 59.1" (≥ 150 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
68–79°F (20–26°C)
Intermediate

False Tiger Knifefish

Gymnotus javari

Adult size
≤ 7.9" (≤ 20 cm)
Aquarium size
66 US gal (250 L) or larger
Temperament
Semi-Aggressive
Zone
Bottom dweller
Temp
75–82°F (24–28°C)
Intermediate

Featherfin Catfish

Synodontis eupterus

Adult size
≤ 11.8" (≤ 30 cm)
Aquarium size
132 US gal (500 L) or larger / ≥ 70.9" (≥ 180 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
72–81°F (22–27°C)
Intermediate

Featherfin Pearlfish

Simpsonichthys constanciae

Adult size
≤ 2.4" (≤ 6 cm)
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
72–77°F (22–25°C)
Beginner – Intermediate

Featherfin Tetra

Hemigrammus unilineatus

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
18 US gal (70 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
73–82°F (23–28°C)
Beginner – Intermediate

Fieryblack Shiner

Cyprinella pyrrhomelas

Adult size
≤ 4.3" (≤ 11 cm)
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
64–75°F (18–24°C)
Intermediate – Advanced

Figure Eight Pufferfish

Dichotomyctere ocellatus

Adult size
≤ 3.1" (≤ 8 cm)
Aquarium size
18 US gal (68 L) or larger / ≥ 29.5" (≥ 75 cm) minimum length
Temperament
Semi-Aggressive
Temp
72–79°F (22–26°C)
Beginner – Intermediate

Filament Tetra

Bryconaethiops microstoma

Adult size
≤ 5.9" (≤ 15 cm)
Aquarium size
37 US gal (140 L) or larger / ≥ 39.4" (≥ 100 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
75–82°F (24–28°C)
Beginner – Intermediate

Fire Ant Tetra

Hyphessobrycon myrmex

Adult size
≤ 0.8" (≤ 2 cm)
Aquarium size
16 US gal (60 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
72–81°F (22–27°C)
Beginner – Intermediate

Fire Bar Danio

Devario maetaengensis

Adult size
≤ 2" (≤ 5 cm)
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
68–79°F (20–26°C)
Intermediate – Advanced

Fire Eel

Mastacembelus erythrotaenia

Adult size
≤ 39.4" (≤ 100 cm)
Aquarium size
180 US gal (681 L) or larger / ≥ 78.7" (≥ 200 cm) minimum length
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
75–82°F (24–28°C)
Beginner

Fire Green Tetra

Aphyocharax rathbuni

Adult size
≤ 1.8" (≤ 4.5 cm)
Aquarium size
21 US gal (80 L) or larger / ≥ 19.7" (≥ 50 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
68–79°F (20–26°C)
Beginner – Intermediate

Fire Rasbora

Rasboroides vaterifloris

Adult size
≤ 1.6" (≤ 4 cm)
Aquarium size
20 US gal (76 L) or larger / ≥ 13.8" (≥ 35 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
75–82°F (24–28°C)
Intermediate

Fire Red Licorice Gourami

Parosphromenus sumatranus

Adult size
≤ 1.2" (≤ 3 cm)
Aquarium size
11 US gal (40 L) or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
77–82°F (25–28°C)
Intermediate

Firefly Betta

Betta dimidiata

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
16 US gal (60 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
72–82°F (22–28°C)
Intermediate

Firehead Tetra

Petitella bleheri

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
26 US gal (100 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
Temperament
Peaceful
Zone
Middle swimmer
Temp
75–82°F (24–28°C)
Beginner – Intermediate

Fireline Danio

Devario sondhii

Adult size
≤ 2.4" (≤ 6 cm)
Aquarium size
24 US gal (90 L) or larger / ≥ 29.5" (≥ 75 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
68–79°F (20–26°C)
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