Aquarium Fish Database

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

Beginner – Intermediate

Rohani Barb

Dawkinsia rohani

Adult size
up to 12 cm
Aquarium size
120 L or larger
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
18–25 °C
Beginner – Intermediate

Roloff’s Pygmy Barb

Oreichthys parvus

Adult size
up to 3 cm
Aquarium size
30 L or larger
Temperament
Peaceful
Zone
Middle swimmer
Temp
23–27 °C
Beginner – Intermediate

Rose Danio

Danio roseus

Adult size
up to 4 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
20–26 °C
Beginner

Rosy Barb

Puntius conchonius

Adult size
up to 10 cm
Aquarium size
120 L or larger
Temperament
Peaceful
Zone
Middle swimmer
Temp
17–22 °C
Beginner – Intermediate

Rosy Loach

Tuberoschistura arakanensis

Adult size
up to 3 cm
Aquarium size
30 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
22–26 °C
Beginner – Intermediate

Rosy Tetra

Hyphessobrycon rosaceus

Adult size
up to 5 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
24–28 °C
Intermediate – Advanced

Royal Plecostomus L190

Panaque nigrolineatus

Adult size
up to 45 cm
Aquarium size
900 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
22–30 °C
Beginner – Intermediate

Royal Whiptail Catfish

Sturisoma panamense

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

Ruby Rasbora

Paedocypris progenetica

Adult size
up to 1 cm
Aquarium size
30 L or larger
Temperament
Peaceful
Zone
Middle swimmer
Temp
26–31 °C
Intermediate

Ruby Tetra

Axelrodia riesei

Adult size
up to 2.5 cm
Aquarium size
30 L or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
20–27 °C
Intermediate

Rummy Nose Rasbora

Sawbwa resplendens

Adult size
up to 3.5 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Temp
21–23 °C
Beginner

Rummy Nose Tetra

Hemigrammus rhodostomus

Adult size
up to 5 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Zone
Middle swimmer
Temp
24–27 °C
Beginner – Intermediate

Rusty Corydoras

Corydoras rabauti

Adult size
up to 6.5 cm
Aquarium size
100 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
22–26 °C
Intermediate

Saddleback Loach

Homaloptera orthogoniata

Adult size
up to 12.5 cm
Aquarium size
160 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
20–25 °C
Beginner – Intermediate

Sahul Rainbowfish

Melanotaenia sahulensis

Adult size
up to 5.5 cm
Aquarium size
80 L or larger
Temperament
Peaceful
Zone
Middle swimmer
Temp
22–27 °C
Intermediate – Advanced

Sailfin Tetra

Crenuchus spilurus

Adult size
up to 5.5 cm
Aquarium size
80 L or larger
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
20–27 °C
Beginner – Intermediate

Salt and Pepper Corydoras

Corydoras habrosus

Adult size
up to 3.5 cm
Aquarium size
60 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
20–27 °C
Intermediate – Advanced

Salvini Cichlid

Cichlasoma salvini

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

Salween Rock Catfish

Erethistes filamentosus

Adult size
up to 5 cm
Aquarium size
45 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
20–24 °C
Intermediate – Advanced

Samurai Gourami

Sphaerichthys vaillanti

Adult size
up to 7 cm
Aquarium size
80 L or larger
Temperament
Peaceful
Temp
24–28 °C
Intermediate

Sand Cichlid

Xenotilapia spiloptera

Adult size
up to 10 cm
Aquarium size
200 L or larger
Temperament
Semi-Aggressive
Zone
Bottom to middle swimmer
Temp
26–28 °C
Beginner – Intermediate

Sands Corydoras

Corydoras davidsandsi

Adult size
up to 6 cm
Aquarium size
60 L or larger
Temperament
Peaceful
Zone
Bottom dweller
Temp
20–26 °C
Intermediate

Scarlet Badis

Dario dario

Adult size
up to 2 cm
Aquarium size
120 L or larger
Temperament
Semi-Aggressive
Zone
Bottom to middle swimmer
Temp
18–26 °C
Intermediate

Scarlet Cactus Plecostomus

Pseudacanthicus pirarara

Adult size
up to 40 cm
Aquarium size
300 L or larger
Temperament
Semi-Aggressive
Zone
Bottom dweller
Temp
26–30 °C
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