Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 654 species
Murray Island bandfish
Owstonia merensis
Owstonia merensis is a tiny deepwater bandfish from the western Pacific - think slope/reef-edge trawl depths, not a reef tank fish. It stays small (around 5.7 cm standard length in the literature) and lives way down where water is cool, dark, and super stable, which is why it is basically never a realistic home-aquarium species.
Naked-bellied schizothorax
Schizothorax nudiventris
This is a high-altitude Asian river carp (a schizothoracine) from the upper Mekong (Lancang Jiang) drainage in China. It is built for cool, fast, oxygen-rich water, and adults develop that neat scaleless "naked" patch on the belly/thorax that the name nudiventris is calling out. Not really an aquarium trade fish - more of a wild river species that would need a big, cold, high-flow setup to thrive.
Nanpanjiang stone loach
Yunnanilus nanpanjiangensis
A slender little stone loach from Yunnan’s Nanpanjiang River, it likes cool, clear running water and a sandy or fine gravel bottom. It spends its days nosing through pebbles for tiny critters and really settles in when kept as a small group in a tank with good flow.
Narrowbody handfish
Pezichthys compressus
A very small, demersal Australian handfish (family Brachionichthyidae) that uses its modified fins to move along the seafloor. It is an extremely rare deepwater species known from very few records, and it is not an established aquarium species.
Narrowhead catshark
Bythaelurus tenuicephalus
Bythaelurus tenuicephalus is a tiny deepwater catshark from the western Indian Ocean with a really narrow head and snout (the name is basically calling it out for that). It lives way down around 463-550 m, so its "normal" world is cold, dark, and stable - definitely not something that fits typical home aquarium life.
Needlespine coral goby
Gobiodon acicularis
This is that tiny, jet-dark coral goby with the cool needle-like first dorsal spine - it basically lives tucked into branching corals and just perches all day like it owns the place. Super cryptic and chill, but it is way happier (and easier to keep eating) when it has a real coral head or tight branching structure to call home.
Neolebias
Neolebias gracilis
Tiny, slender African characin from the Ruki drainage in DR Congo. It looks plain at first, but a settled group shows neat schooling moves and subtle shimmer, and they really come alive in soft, tea-colored water. Keep a small shoal and feed fine live or frozen foods and you will see their best behavior.
Neon Green Rasbora
Microdevario kubotai
This is that tiny, glassy-yellow fish that turns into a little green highlighter once it settles into an aquarium-especially over a dark substrate and under decent lighting. They're super active mid-water shoalers, and the whole group "flashing" that neon stripe together is the main event. Keep them in a proper group and they get way bolder and look a lot more intense.
Neon Tetra
Paracheirodon innesi
The Neon Tetra is a small, brightly colored fish known for its vibrant blue and red stripes that run the length of its body. It is a favorite among aquarists due to its striking appearance and peaceful nature. Neon Tetras are schooling fish that thrive in groups, adding a lively and colorful presence to any aquarium.
Neretva dwarf goby
Knipowitschia croatica
This is a tiny little freshwater goby from clear karst springs and slow waters in Croatia and Bosnia-Herzegovina, and it basically lives its whole life down on the bottom. The males guard eggs laid in little cavities under stones or shells, and the whole species is short-lived (under 2 years), so its behavior is way more "seasonal breeder" than "pet fish that lives forever."
New Zealand rough skate
Zearaja nasuta
Zearaja nasuta is a big, cold-water skate from New Zealand that spends its time on the bottom, often half-buried in sand. It is an egg-layer that drops those classic "mermaid's purse" capsules in sandy or muddy areas, and it hunts down fish, crabs, shellfish, and worms. Super cool animal, but not something that belongs in a normal home aquarium due to its size and cold marine needs.
Niulan Yunnan loach
Yunnanilus niulanensis
Yunnanilus niulanensis is a small freshwater stone loach (Nemacheilidae) described from the upper Niulanjiang River (a branch of the Jinsha River) in Songming County, Yunnan, China. It is characterized by large brown spots on the upper two-thirds of the body and head; aquarium availability and husbandry are not well-documented in authoritative sources.