🌱Nano tank friendly
Species that stay small enough to thrive in tanks under 20 gallons. Perfect for desktop setups, planted nanos, and pico reefs.
323 species
Nijssen's cory
FishCorydoras nijsseni
A rare Rio Negro cory with bold patterning and a surprisingly long lifespan.
Norman's Lampeye
FishPoropanchax normani
Tiny West African killifish with glowing blue eyes that shimmer in low light.
Northern longsnose cory
FishCorydoras septentrionalis
A long-lived Orinoco bottom-dweller that breathes air and blinks at you.
Okinawa Goby
FishGobiodon okinawae
Tiny, vivid, and inseparable from its Acropora home.
One-lined Pencilfish
FishNannostomus unifasciatus
A tiny pencilfish that swims at a permanent angle, day and night.
Oneline Tetra
FishNannaethiops unitaeniatus
A peaceful little African schooler that deserves far more attention than it gets.
Orchid Island Goby
FishRhinogobius lanyuensis
A tiny island goby from one of Taiwan's most remote corners.
Ornate Paradisefish
FishMalpulutta kretseri
A rare Sri Lankan gem that deserves a species tank all to itself.
Ornate rainbowfish
FishRhadinocentrus ornatus
A tiny Australian rainbowfish from wild, tea-stained wallum streams.
Otocinclus
FishOtocinclus vittatus
Tiny algae-grazing catfish that plasters itself to glass and plants alike.
Otocinclus Catfish (Tank-Bred)
FishOtocinclus macrospilus
The most commonly sold oto, fragile at first but rewarding once settled.
Otocinclus cocama
FishA tiny Peruvian algae grazer with bold, zebra-like blotches and a gentle disposition.
Oyapock Cory
FishCorydoras condiscipulus
A long-lived Oyapock armored catfish that breathes air and blinks its eyes.
Panda Cory
FishCorydoras panda
The panda-patterned cory that's as personable as it is peaceful.
Peaceful Betta
FishBetta imbellis
The gentler betta. Males can sometimes share a tank if given enough cover.
Pelvic-spot Wrasse
FishPseudocheilinops ataenia
A tiny, secretive reef wrasse that vanishes into the coral the moment you look away.
Pencilfish
FishNannostomus grandis
The largest pencilfish, rarely seen but worth the search.
Pencilfish
FishNannostomus minimus
Tiny, timid, and barely an inch long. A pencilfish for the dedicated nano keeper.
Pentazona Barb
FishDesmopuntius hexazona
A dainty six-banded barb that thrives in big, lively groups
Peruvian Tetra
FishHyphessobrycon peruvianus
A slender Upper Amazon tetra often misidentified but worth tracking down properly.
Petracini's cory
FishCorydoras petracinii
A tiny Argentine cory built for rocky currents, rarely if ever seen in the hobby.
Picotee Livebearer
FishPhallichthys fairweatheri
A gentle little livebearer from Central America's marshy backwaters.
Pigmy Synodontis
FishMicrosynodontis polli
A tiny, peaceful African catfish that fits where most synodontis never could.
Polka Dot Cory
FishCorydoras polystictus
A tiny armored catfish that thrives in groups and breathes air when it needs to.
Pookode Lake Barb
FishPethia pookodensis
A rare gem from a single Indian lake, perfect for peaceful community tanks.
Puntius Sp. Pearlscale
FishPethia stoliczkana
A peaceful schooling barb from mainland Southeast Asia, best kept in numbers.
Purple Oil Catfish
FishCentromochlus reticulatus
A tiny gregarious catfish from Guyana that sometimes goes by 'purple oil catfish'.
Purple Pencilfish
FishNannostomus rubrocaudatus
Tiny, territorial, and blazing with red-purple color. A pencilfish with real attitude.
Pygmy Cory
FishCorydoras pygmaeus
Tiny catfish that defies expectations by schooling in open water, not just the bottom.
Pygmy Hatchetfish
FishCarnegiella myersi
Tiny, delicate, and built for the surface. The smallest hatchetfish of them all.
Pygmy Rasbora
FishBoraras maculatus
A pea-sized schooling fish that rewards patience with dazzling group displays.
Pygmy Swordtail
FishXiphophorus pygmaeus
A pint-sized livebearer with all the personality of its larger swordtail cousins.
Red Barred Killi
FishAphyosemion elberti
A small, manageable killifish with bold markings from Central African stream systems.
Redbreast Acara
FishLaetacara dorsigera
A tiny South American cichlid with a boldly colored chest and a gentle personality.
Red Dwarf Rasbora
FishMicrorasbora rubescens
A tiny Lake Inle gem that truly shines when kept in a proper-sized school.
Redfin Two-banded Carplet
FishPethia reval
A tiny Sri Lankan barb with vivid red fins and an easy-going nature.