BeginnerThreadfin Rainbowfish
Iriatherina werneri
- Adult size
- ≤ 1.6" (≤ 4 cm)
- Aquarium size
- 14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
- Temperament
- Peaceful
- Zone
- Top swimmer
- Temp
- 70–86°F (21–30°C)
Aquarium Fish Database
Explore freshwater aquarium fish by care level, size, temperament, swimming zone, water parameters, and compatibility.
Beginner
IntermediateThree Beacon Plecostomus L091
Leporacanthicus triactis
- Adult size
- ≤ 9.8" (≤ 25 cm)
- Aquarium size
- 64 US gal (243 L) or larger / ≥ 59.1" (≥ 150 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 75–81°F (24–27°C)
Beginner – IntermediateThree Line Corydoras
Corydoras trilineatus
- Adult size
- ≤ 2.2" (≤ 5.5 cm)
- Aquarium size
- 26 US gal (100 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 72–79°F (22–26°C)
Beginner – IntermediateThree Lined Pencilfish
Nannostomus trifasciatus
- Adult size
- ≤ 1.6" (≤ 4 cm)
- Aquarium size
- 16 US gal (60 L) or larger / ≥ 29.5" (≥ 75 cm) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 73–81°F (23–27°C)
Beginner – IntermediateThree Spot Gourami
Trichopodus trichopterus
- Adult size
- ≤ 5.9" (≤ 15 cm)
- Aquarium size
- 53 US gal (200 L) or larger / ≥ 39.4" (≥ 100 cm) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 73–86°F (23–30°C)
Beginner – IntermediateThree Spotted Dwarf Rasbora
Boraras micros
- Adult size
- ≤ 0.8" (≤ 2 cm)
- Aquarium size
- 11 US gal (41 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length
- Temperament
- Peaceful
- Temp
- 75–82°F (24–28°C)
IntermediateThree Spotted Halfbeak
Hemirhamphodon kuekenthali
- Adult size
- ≤ 2.8" (≤ 7 cm)
- Aquarium size
- 30 US gal (112 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
- Temperament
- Peaceful
- Zone
- Top swimmer
- Temp
- 75–82°F (24–28°C)
IntermediateThree Striped Apistogramma
Apistogramma trifasciata
- Adult size
- ≤ 2.2" (≤ 5.5 cm)
- Aquarium size
- 26 US gal (100 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
- Temperament
- Semi-Aggressive
- Zone
- Bottom to middle swimmer
- Temp
- 68–77°F (20–25°C)
IntermediateThreespot Headstander
Pseudanos trimaculatus
- Adult size
- ≤ 7.1" (≤ 18 cm)
- Aquarium size
- 106 US gal (400 L) or larger / ≥ 59.1" (≥ 150 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 73–81°F (23–27°C)
Intermediate – AdvancedThreespot Leporinus
Leporinus friderici
- Adult size
- ≤ 15.7" (≤ 40 cm)
- Aquarium size
- 396 US gal (1500 L) or larger / ≥ 94.5" (≥ 240 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 73–79°F (23–26°C)
Beginner – IntermediateTicto Barb
Pethia ticto
- Adult size
- ≤ 2.8" (≤ 7 cm)
- Aquarium size
- 19 US gal (72 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 64–77°F (18–25°C)
Beginner – IntermediateTiger Barb
Puntigrus tetrazona
- Adult size
- 2–2.8" (5–7 cm)
- Aquarium size
- 29 US gal (110 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
- Temperament
- Semi-Aggressive
- Zone
- Middle swimmer
- Temp
- 68–79°F (20–26°C)
Beginner – IntermediateTiger Butterfly Loach
Gastromyzon sp.
- Adult size
- ≤ 2" (≤ 5 cm)
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 75–82°F (24–28°C)
IntermediateTiger Dwarf Goby
Mugilogobius tigrinus
- Adult size
- ≤ 1" (≤ 2.5 cm)
- Aquarium size
- 8 US gal (30 L) or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 72–82°F (22–28°C)
Beginner – IntermediateTiger Otocinclus
Otocinclus cocama
- Adult size
- ≤ 2" (≤ 5 cm)
- Aquarium size
- 11 US gal (41 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 70–79°F (21–26°C)
Intermediate – AdvancedTiger Shovelnose Catfish
Pseudoplatystoma fasciatum
- Adult size
- ≤ 35.4" (≤ 90 cm)
- Aquarium size
- 2739 US gal (10368 L) or larger / ≥ 141.7" (≥ 360 cm) minimum length
- Temperament
- Semi-Aggressive
- Zone
- Bottom dweller
- Temp
- 73–81°F (23–27°C)
Beginner – IntermediateTiger Teddy Livebearer
Neoheterandria elegans
- Adult size
- ≤ 1" (≤ 2.5 cm)
- Aquarium size
- 5 US gal (19 L) or larger / ≥ 11.8" (≥ 30 cm) minimum length
- Temperament
- Peaceful
- Temp
- 75–82°F (24–28°C)
Intermediate – AdvancedTinfoil Barb
Barbonymus schwanenfeldii
- Adult size
- ≤ 13.8" (≤ 35 cm)
- Aquarium size
- 264 US gal (1000 L) or larger / ≥ 78.7" (≥ 200 cm) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 73–79°F (23–26°C)
IntermediateToba Betta
Betta rubra
- Adult size
- ≤ 1.6" (≤ 4 cm)
- Aquarium size
- 10 US gal (38 L) or larger / ≥ 18.1" (≥ 46 cm) minimum length
- Temperament
- Semi-Aggressive
- Zone
- Middle to top swimmer
- Temp
- 70–77°F (21–25°C)
Beginner – IntermediateTolson’s Snakehead Gudgeon
Giuris tolsoni
- Adult size
- ≤ 3.9" (≤ 10 cm)
- Aquarium size
- 26 US gal (100 L) or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 75–82°F (24–28°C)
Beginner – IntermediateTonkin Bitterling
Acheilognathus tonkinensis
- Adult size
- ≤ 4.7" (≤ 12 cm)
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 64–75°F (18–24°C)
Beginner – IntermediateToucan Tetra
Tucanoichthys tucano
- Adult size
- ≤ 0.8" (≤ 2 cm)
- Aquarium size
- 11 US gal (40 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 68–73°F (20–23°C)
Beginner – IntermediateTowoetii Halfbeak
Nomorhamphus towoetii
- Adult size
- ≤ 3.1" (≤ 8 cm)
- Aquarium size
- 20 US gal (76 L) or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 72–77°F (22–25°C)
Beginner – IntermediateTowuti Black Hi Fin Goby
Glossogobius flavipinnis
- Adult size
- ≤ 3.1" (≤ 8 cm)
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 79–86°F (26–30°C)