Fish That Start With N
Browse all aquarium fish species with common names beginning with "N". Each profile includes care requirements, water parameters, tank size recommendations, and compatibility information for freshwater, marine, and brackish species.
In the letter 'N', you will find a diverse assortment of aquarium fish, including popular community species and striking ornamentals. Examples include the peaceful Golden pencilfish (Nannostomus beckfordi) and the vibrant Firefish (Nemateleotris magnifica), which adds color to reef tanks. The Emperor tetra (Nematobrycon palmeri) offers a unique beauty that makes it a favored choice among aquarists.
no common name
Trichomycterus trefauti
This is a tiny stream-dwelling pencil catfish from the upper Sao Francisco basin in Minas Gerais, Brazil. It tops out around 5 cm and comes from cool, shallow riffles with pebbles and strong flow, with a neat oval spot at the tail base and a little filament on the first pectoral ray. Super cool oddball, but it really appreciates clean, highly oxygenated water and current.
no established common name
Aphanotorulus phrixosoma
This is a super obscure Peruvian loricariid that is only known from a single specimen and is thought to be a hybrid, so you will not run into it in shops. If you are into sleek, fast river plecos, its close relatives like Aphanotorulus emarginatus scratch the same itch. Treat any husbandry as a best guess based on congeners rather than nailed-down rules.
no established common name
Zagadkogobius ourlazon
This is a tiny deep-water wormfish from the South China Sea, topping out around 1.8 cm. It was described from a single specimen taken near the Anambas Islands at about 73 m, so you never see it in the hobby; the giveaway features are a big dark spot under the eye and wispy first-dorsal filaments.
none
Dysomma fuscoventralis
A deep Red Sea cutthroat eel that lives way below normal diving depths, so it is very much a look-dont-keep species. Adults get to around 26 cm and likely snack on small fishes and crustaceans in the dark. If you are planning a tank, skip this one - you just cant recreate true deep-water conditions at home.