Aquarium Fish Database

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

Intermediate

Scarlet Badis

Dario dario

Adult size
≤ 0.8" (≤ 2 cm)
Aquarium size
11 US gal (40 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length
Temperament
Semi-Aggressive
Zone
Bottom to middle swimmer
Temp
64–79°F (18–26°C)
Intermediate

Scarlet Cactus Plecostomus

Pseudacanthicus pirarara

Adult size
≤ 15.7" (≤ 40 cm)
Aquarium size
264 US gal (1000 L) or larger / ≥ 78.7" (≥ 200 cm) minimum length
Temperament
Semi-Aggressive
Zone
Bottom dweller
Temp
79–86°F (26–30°C)
Beginner – Intermediate

Scarlet Shiner

Lythrurus fasciolaris

Adult size
≤ 3.5" (≤ 9 cm)
Temperament
Peaceful
Zone
Middle swimmer
Temp
64–72°F (18–22°C)
Intermediate – Advanced

Schistura spilota

Schistura spilota

Adult size
≤ 3.9" (≤ 10 cm)
Aquarium size
29 US gal (108 L) or larger / ≥ 47.2" (≥ 120 cm) minimum length
Temperament
Semi-Aggressive
Zone
Bottom dweller
Temp
68–79°F (20–26°C)
Beginner – Intermediate

Schlesers Longfin Killifish

Aphyolebias schleseri

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
11 US gal (40 L) or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
72–79°F (22–26°C)
Beginner – Intermediate

Schmard Tetra

Hemigrammus schmardae

Adult size
≤ 2" (≤ 5 cm)
Aquarium size
15 US gal (57 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

Schwartzs Corydoras

Hoplisoma schwartzi

Adult size
≤ 2.8" (≤ 7 cm)
Aquarium size
19 US gal (71 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
72–79°F (22–26°C)
Beginner – Intermediate

Scratched Inpa Tetra

Inpaichthys parauapiranga

Adult size
≤ 1.6" (≤ 4 cm)
Aquarium size
20 US gal (75 L) or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
72–79°F (22–26°C)
Intermediate

Senegal Minnow

Raiamas senegalensis

Adult size
≤ 9.8" (≤ 25 cm)
Aquarium size
75 US gal (284 L) or larger
Temperament
Peaceful
Zone
Middle swimmer
Temp
72–79°F (22–26°C)
Beginner – Intermediate

Sentani Rainbowfish

Chilatherina sentaniensis

Adult size
≤ 4.7" (≤ 12 cm)
Aquarium size
79 US gal (300 L) or larger
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
75–84°F (24–29°C)
Beginner

Serpae Tetra

Megalamphodus eques

Adult size
≤ 2.4" (≤ 6 cm)
Aquarium size
19 US gal (72 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
Temperament
Peaceful
Zone
Middle swimmer
Temp
72–79°F (22–26°C)
Intermediate

Serpent Loach

Serpenticobitis octozona

Adult size
≤ 2.4" (≤ 6 cm)
Aquarium size
18 US gal (68 L) or larger / ≥ 29.5" (≥ 75 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
73–79°F (23–26°C)
Intermediate

Severum Cichlid-Heros efasciatus

Heros efasciatus

Adult size
≤ 11.8" (≤ 30 cm)
Aquarium size
92 US gal (350 L) or larger / ≥ 47.2" (≥ 120 cm) minimum length
Temperament
Peaceful
Zone
Middle swimmer
Temp
75–84°F (24–29°C)
Intermediate

Severum Cichlid-Heros severus

Heros severus

Adult size
≤ 7.9" (≤ 20 cm)
Aquarium size
119 US gal (450 L) or larger / ≥ 43.3" (≥ 110 cm) minimum length
Temperament
Peaceful
Zone
Middle swimmer
Temp
75–84°F (24–29°C)
Intermediate

Sharphead Eartheater

Satanoperca acuticeps

Adult size
≤ 6.7" (≤ 17 cm)
Aquarium size
171 US gal (648 L) or larger / ≥ 70.9" (≥ 180 cm) minimum length
Temperament
Peaceful
Zone
Middle swimmer
Temp
68–82°F (20–28°C)
Beginner – Intermediate

Shen’s River Loach

Hemimyzon sheni

Adult size
≤ 2" (≤ 5 cm)
Temperament
Peaceful
Zone
Bottom dweller
Temp
61–72°F (16–22°C)
Beginner – Intermediate

Short Ninespine Stickleback

Pungitius kaibarae

Adult size
≤ 2.6" (≤ 6.5 cm)
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
64–75°F (18–24°C)
Beginner – Intermediate

Siamese Algae Eater

Crossocheilus oblongus

Adult size
≤ 5.9" (≤ 15 cm)
Aquarium size
53 US gal (200 L) or larger / ≥ 39.4" (≥ 100 cm) minimum length
Temperament
Peaceful
Zone
Bottom dweller
Temp
75–81°F (24–27°C)
Beginner – Intermediate

Siamese Dwarf Rasbora

Trigonostigma somphongsi

Adult size
≤ 1" (≤ 2.5 cm)
Aquarium size
14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
70–79°F (21–26°C)
Intermediate – Advanced

Siamese Tigerfish

Datnioides microlepis

Adult size
≤ 17.7" (≤ 45 cm)
Temperament
Semi-Aggressive
Temp
72–79°F (22–26°C)
Intermediate

Silver Dollar

Metynnis argenteus

Adult size
≤ 5.9" (≤ 15 cm)
Aquarium size
70 US gal (265 L) or larger / ≥ 70.9" (≥ 180 cm) minimum length
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
75–82°F (24–28°C)
Beginner – Intermediate

Silver Flying Fox

Crossocheilus reticulatus

Adult size
≤ 5.1" (≤ 13 cm)
Aquarium size
79 US gal (300 L) or larger / ≥ 59.1" (≥ 150 cm) minimum length
Temperament
Peaceful
Zone
Bottom to middle swimmer
Temp
61–73°F (16–23°C)
Beginner – Intermediate

Silvertip Tetra

Hasemania nana

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
70–81°F (21–27°C)
Beginner – Intermediate

Silvery Black Tailed Tetra

Hemiodus immaculatus

Adult size
≤ 9.8" (≤ 25 cm)
Temperament
Peaceful
Zone
Middle to top swimmer
Temp
75–82°F (24–28°C)
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