Western Rainbowfish
Melanotaenia australis
- Adult size
- ≤ 4.7" (≤ 12 cm)
- Aquarium size
- 29 US gal (108 L) or larger / ≥ 47.2" (≥ 120 cm) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 72–81°F (22–27°C)
Aquarium Fish Database
Explore freshwater aquarium fish by care level, size, temperament, swimming zone, water parameters, and compatibility.
White Cloud Mountain Minnow
Tanichthys albonubes
- Adult size
- 1.2–1.6" (3–4 cm)
- Aquarium size
- 14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 57–72°F (14–22°C)
White Skirt Tetra
Gymnocorymbus ternetzi
- Adult size
- ≤ 3" (≤ 7.5 cm)
- Aquarium size
- 20 US gal (75 L) or larger / ≥ 29.5" (≥ 75 cm) minimum length
- Temperament
- Generally social but may nip the fins of slow or long-finned tankmates.
- Zone
- All-zone swimmer
- Temp
- 68–79°F (20–26°C)
White Spotted Cichlid
Tropheus duboisi
- Adult size
- ≤ 4.7" (≤ 12 cm)
- Aquarium size
- 84 US gal (319 L) or larger / ≥ 60" (≥ 152.4 cm) minimum length
- Temperament
- Semi-Aggressive
- Zone
- All-zone swimmer
- Temp
- 73–81°F (23–27°C)
White-blotched River Stingray
Potamotrygon leopoldi
- Aquarium size
- 428 US gal (1620 L) or larger / ≥ 94.5" (≥ 240 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 68–84°F (20–29°C)
Whitecheek Goby
Rhinogobius duospilus
- Adult size
- ≤ 2.4" (≤ 6.2 cm)
- Aquarium size
- 14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 59–77°F (15–25°C)
Whitespot Eartheater
Satanoperca leucosticta
- Adult size
- ≤ 5.9" (≤ 15 cm)
- Aquarium size
- 171 US gal (648 L) or larger / ≥ 70.9" (≥ 180 cm) minimum length
- Temperament
- Semi-Aggressive
- Zone
- Middle swimmer
- Temp
- 68–82°F (20–28°C)
X-ray Tetra
Pristella maxillaris
- Adult size
- ≤ 1.8" (≤ 4.5 cm)
- Aquarium size
- 14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
- Temperament
- Peaceful
- Zone
- Middle swimmer
- Temp
- 72–82°F (22–28°C)
Xingu Corydoras
Hoplisoma xinguense
- Adult size
- ≤ 1.5" (≤ 3.7 cm)
- Aquarium size
- ≥ 17.7" (≥ 45 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 72–79°F (22–26°C)
Y Striped Leporinus
Leporinus y-ophorus
- Adult size
- ≤ 7.9" (≤ 20 cm)
- Temperament
- Semi-Aggressive
- Zone
- Bottom to middle swimmer
- Temp
- 72–81°F (22–27°C)
Yabassi Lampeye Killifish
Procatopus nototaenia
- Adult size
- ≤ 2.4" (≤ 6 cm)
- Aquarium size
- ≥ 23.6" (≥ 60 cm) minimum length
- Temperament
- Peaceful
- Zone
- Middle swimmer
- Temp
- 68–77°F (20–25°C)
Yellow Acara
Aequidens metae
- Adult size
- ≤ 5.1" (≤ 13 cm)
- Aquarium size
- ≥ 59.1" (≥ 150 cm) minimum length
- Temperament
- Semi-Aggressive
- Zone
- All-zone swimmer
- Temp
- 75–82°F (24–28°C)
Yellow Marbled Synodontis
Synodontis schoutedeni
- Adult size
- ≤ 5.4" (≤ 13.8 cm)
- Aquarium size
- 21 US gal (81 L) or larger / ≥ 35.4" (≥ 90 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 72–81°F (22–27°C)
Yellow Phantom Tetra
Hyphessobrycon roseus
- 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
- 68–82°F (20–28°C)
Yellow Tailed Congo Tetra
Alestopetersius caudalis
- Adult size
- ≤ 2.4" (≤ 6 cm)
- Aquarium size
- 29 US gal (108 L) or larger / ≥ 47.2" (≥ 120 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 72–79°F (22–26°C)
Yellow Tiger Endler
Poecilia wingei
- Adult size
- ≤ 1" (≤ 2.5 cm)
- Aquarium size
- 14 US gal (54 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 75–86°F (24–30°C)
Yellowfin Shiner
Hydrophlox lutipinnis
- Adult size
- ≤ 2.4" (≤ 6 cm)
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 50–73°F (10–23°C)
Yellowstripe Goby
Mugilogobius chulae
- Adult size
- ≤ 1.6" (≤ 4 cm)
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 72–82°F (22–28°C)
Yoma Danio
Danio feegradei
- Adult size
- ≤ 2.7" (≤ 6.8 cm)
- Aquarium size
- 64 US gal (243 L) or larger / ≥ 47.2" (≥ 120 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 64–77°F (18–25°C)
Yoyo Loach
Botia almorhae
- Adult size
- ≤ 5.9" (≤ 15 cm)
- Aquarium size
- 75 US gal (284 L) or larger / ≥ 59.8" (≥ 152 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 75–86°F (24–30°C)
Zebra Loach
Botia striata
- Adult size
- ≤ 3.5" (≤ 9 cm)
- Aquarium size
- 42 US gal (160 L) or larger / ≥ 47.2" (≥ 120 cm) minimum length
- Temperament
- Generally peaceful; active and may nip trailing fins or intimidate very small fish.
- Zone
- Bottom dweller
- Temp
- 70–79°F (21–26°C)
Zebra Plecostomus L046
Hypancistrus zebra
- Adult size
- ≤ 3.1" (≤ 8 cm)
- Aquarium size
- 26 US gal (100 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 79–86°F (26–30°C)
Zhou’s Scarlet Goby
Rhinogobius zhoui
- Adult size
- ≤ 1.4" (≤ 3.6 cm)
- Aquarium size
- 26 US gal (100 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
- Temperament
- Males territorial with each other; compatible with some small peaceful upper-water fish if habitat needs match.
- Zone
- Bottom to middle swimmer
- Temp
- 66–75°F (19–24°C)
Zig-zag Eel
Mastacembelus armatus
- Adult size
- 19.7–35.4" (50–90 cm)
- Aquarium size
- 159 US gal (600 L) or larger / ≥ 70.9" (≥ 180 cm) minimum length
- Temperament
- Large nocturnal predator of small tankmates; may be aggressive to conspecifics but not uniformly aggressive to large non-prey fish.
- Zone
- Bottom dweller
- Temp
- 75–82°F (24–28°C)
