Aquarium Fish Database

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

Intermediate

Polka Dot Loach

Botia kubotai

Adult size
≤ 4.7" (≤ 12 cm)
Aquarium size
53 US gal (200 L) or larger / ≥ 47.2" (≥ 120 cm) minimum length
Temperament
Semi-Aggressive
Zone
Bottom to middle swimmer
Temp
73–81°F (23–27°C)
Intermediate

Polka Dot Synodontis

Synodontis angelicus

Adult size
≤ 9.8" (≤ 25 cm)
Aquarium size
55 US gal (208 L) or larger / ≥ 59.1" (≥ 150 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
75–82°F (24–28°C)
Beginner – Intermediate

Polystictus Corydoras

Corydoras polystictus

Adult size
≤ 1.2" (≤ 3 cm)
Aquarium size
21 US gal (80 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
72–82°F (22–28°C)
Beginner – Intermediate

Popondetta Blue Eye Rainbowfish

Pseudomugil connieae

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
15 US gal (55 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Middle swimmer
Temp
73–81°F (23–27°C)
Beginner – Intermediate

Pretty Tetra

Hemigrammus pulcher

Adult size
≤ 1.8" (≤ 4.5 cm)
Aquarium size
18 US gal (70 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
73–79°F (23–26°C)
Beginner – Intermediate

Pulcher Corydoras

Brochis pulcher

Adult size
≤ 2.8" (≤ 7 cm)
Aquarium size
20 US gal (76 L) or larger / ≥ 25.6" (≥ 65 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
72–79°F (22–26°C)
Beginner – Intermediate

Pulcher Mystus

Mystus pulcher

Adult size
≤ 4.7" (≤ 12 cm)
Temperament
Peaceful
Zone
Bottom dweller
Temp
73–77°F (23–25°C)
Beginner – Intermediate

Purple Pencilfish

Nannostomus rubrocaudatus

Adult size
≤ 1.6" (≤ 4 cm)
Aquarium size
17 US gal (64 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
73–81°F (23–27°C)
Beginner – Intermediate

Purple Sailfin Gudgeon

Microphysogobio tafangensis

Adult size
≤ 3.5" (≤ 9 cm)
Aquarium size
20 US gal (75 L) or larger
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
50–86°F (10–30°C)
Beginner – Intermediate

Pygmy Corydoras

Gastrodermus pygmaeus

Adult size
≤ 1.2" (≤ 3 cm)
Aquarium size
11 US gal (40 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
72–79°F (22–26°C)
Intermediate

Pygmy Hatchetfish

Carnegiella myersi

Adult size
≤ 1" (≤ 2.5 cm)
Aquarium size
13 US gal (50 L) or larger / ≥ 19.7" (≥ 50 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
73–79°F (23–26°C)
Beginner – Intermediate

Pygmy Leopard Catfish

Synodontis petricola

Adult size
≤ 3.9" (≤ 10 cm)
Aquarium size
29 US gal (110 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
Temperament
Peaceful
Zone
Middle swimmer
Temp
75–82°F (24–28°C)
Beginner – Intermediate

Pygmy Swordtail

Xiphophorus pygmaeus

Adult size
≤ 1.6" (≤ 4 cm)
Aquarium size
14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
72–79°F (22–26°C)
Beginner – Intermediate

Raccoon Tetra

Hyphessobrycon procyon

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
16 US gal (60 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
73–81°F (23–27°C)
Intermediate

Rainbow Cichlid

Herotilapia multispinosa

Adult size
≤ 6.7" (≤ 17 cm)
Aquarium size
53 US gal (200 L) or larger / ≥ 39.4" (≥ 100 cm) minimum length
Temperament
Semi-Aggressive
Temp
72–81°F (22–27°C)
Beginner – Intermediate

Rainbow Copella Tetra

Copella vilmae

Adult size
≤ 1.8" (≤ 4.5 cm)
Aquarium size
16 US gal (60 L) or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
68–81°F (20–27°C)
Beginner

Rainbow Lizard Tetra

Iguanodectes geisler

Adult size
≤ 2.2" (≤ 5.5 cm)
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
72–79°F (22–26°C)
Beginner

Rainbow Shark

Epalzeorhynchos frenatum

Adult size
≤ 5.9" (≤ 15 cm)
Aquarium size
53 US gal (200 L) or larger / ≥ 47.2" (≥ 120 cm) minimum length
Temperament
Semi-Aggressive
Zone
Bottom dweller
Temp
72–81°F (22–27°C)
Beginner – Intermediate

Rainbow Shiner

Hydrophlox chrosomus

Adult size
≤ 3.1" (≤ 8 cm)
Aquarium size
26 US gal (100 L) or larger / ≥ 39.4" (≥ 100 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
50–73°F (10–23°C)
Beginner – Intermediate

Rainbow Stiphodon Goby

Stiphodon ornatus

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
18 US gal (70 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
68–82°F (20–28°C)
Beginner – Intermediate

Rainbow Tetra

Nematobrycon lacortei

Adult size
≤ 1.6" (≤ 4 cm)
Aquarium size
21 US gal (80 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Middle swimmer
Temp
72–79°F (22–26°C)
Intermediate

Ram Cichlid

Mikrogeophagus ramirezi

Adult size
≤ 3.1" (≤ 8 cm)
Aquarium size
14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
77–84°F (25–29°C)
Intermediate – Advanced

Red Banded Leporinus

Synaptolaemus latofasciatus

Adult size
≤ 4.7" (≤ 12 cm)
Aquarium size
64 US gal (243 L) or larger / ≥ 47.2" (≥ 120 cm) minimum length
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
75–81°F (24–27°C)
Beginner – Intermediate

Red Base Tetra

Hemigrammus stictus

Adult size
≤ 1.8" (≤ 4.5 cm)
Aquarium size
18 US gal (70 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Top swimmer
Temp
72–79°F (22–26°C)
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