Schooling freshwater fish: U
All schooling freshwater fish whose common name starts with U, in alphabetical order. Each card links to its care guide.
3 species
Ulrey's tetra
Hemigrammus ulreyi
Freshwater1.7 in (4.4 cm) · 20 gal (75 L)72–81°F (22–27°C)Unicorn tetra
Erythrocharax altipinnis
Freshwater1.3 in (3.3 cm) · 14 gal (54 L)75–82°F (24–28°C)
Upside-down catfish
Synodontis nigriventris
Freshwater3.9 in (10 cm) · 30 gal (115 L)75–82°F (24–28°C)
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