Fish Encyclopedia
Search and identify 1,000+ fish species — freshwater, saltwater, reef, and pelagic — with habitat, size, diet, behavior, and how to tell them apart.
Scissortail Rasbora
A slender silver rasbora named for its striking black-and-white tail markings that open and close in a scissor-like motion while swimming.
freshwater
Harlequin Rasbora
A small, deep-bodied freshwater fish with a coppery-orange body and a distinctive black triangular patch covering the rear half, native to the blackwater streams of Southeast Asia.
freshwater
Chili Rasbora
One of the smallest cyprinids in the aquarium hobby, the Chili Rasbora is an intensely red nano fish native to Borneo's acidic blackwater swamps.
freshwater
Dwarf Gourami
A small, colorful labyrinth fish from South Asia, with males displaying vivid diagonal red and blue stripes, popular in the freshwater aquarium trade.
freshwater
Dwarf Livebearer
One of the smallest fish species in the world, this tiny freshwater livebearer from the southeastern United States is prized for its miniature size and easy breeding.
freshwater
Dwarf Lionfish
A compact, mottled lionfish with broad fan-like fins and venomous spines, ambushing prey on Indo-Pacific reefs.
reef
Dwarf Seahorse
One of the smallest seahorse species in the world, standing barely a few centimeters tall and clinging to seagrass blades in shallow waters of the southeastern United States and Bahamas.
saltwater
Dwarf Pufferfish
The Dwarf Pufferfish is one of the world's smallest puffers, a freshwater species from southern India prized for its tiny size and expressive, alert behavior.
freshwater
Dwarf Neon Rainbowfish
A pint-sized New Guinea rainbowfish and one of the smallest Melanotaenia species, known in the aquarium trade for its saturated blue-violet males.
freshwater
Pygmy Swordtail
One of the smallest members of the swordtail genus, this diminutive Mexican livebearer lacks the elongated tail sword typical of its larger relatives.
freshwaterMiller Lake Lamprey
The Miller Lake lamprey is a tiny, non-parasitic jawless fish historically restricted to a single lake and its tributary streams in Oregon, one of the smallest lamprey species known.
freshwater
Neon Rainbowfish
A small, brilliantly colored rainbowfish from New Guinea whose males flash iridescent blue-violet when displaying to rivals or mates.
freshwater
Sterlet
The sterlet is the smallest widespread sturgeon species, a slender freshwater fish of Ponto-Caspian rivers known for its long, thin, upturned snout with fringed barbels.
freshwater
Zebra Turkeyfish
A dwarf lionfish species boldly striped in reddish-brown and white, with broad, fan-like pectoral fins used to corner small prey against reef rubble.
reef
Pygmy Corydoras
The Pygmy Corydoras is one of the smallest armored catfish species, a tiny schooling fish native to slow-moving tributaries of the Amazon basin.
freshwater
Celestial Pearl Danio
A tiny, jewel-like danio with a dark blue body covered in pearly spots and orange-red banded fins, discovered only in the mid-2000s in Myanmar.
freshwater
Sparkling Gourami
A tiny, jewel-like Southeast Asian gourami covered in iridescent blue-green spangling and reddish stripes, small enough to be one of the smallest gouramis kept in aquariums.
freshwater
Least Killifish
One of the smallest vertebrates in North America, the least killifish is a tiny livebearer native to slow, vegetated wetlands of the southeastern United States despite its misleading name.
freshwater
Honey Gourami
A small, peaceful South Asian labyrinth fish whose breeding males flush a warm honey-gold to orange color with a dark throat and belly, making it a popular gentle community fish.
freshwater
Ember Tetra
A tiny, glowing orange-red tetra that shoals in large numbers and is among the smallest characins kept in freshwater aquaria.
freshwater
Rosy Loach
The Rosy Loach is a tiny, delicately colored nano loach from Myanmar's slow-moving, vegetated streams and pools, prized for its diminutive size and rosy-pink hues.
freshwater
Orange Chromide
A small, bright orange-yellow cichlid from South Asian estuaries, marked by a single dark spot near the tail. It is the smallest member of its genus and a popular, peaceful aquarium fish.
brackish
Otocinclus
A tiny suckermouth catfish that spends most of its time grazing algae and biofilm from surfaces in slow-moving South American waters.
freshwater
Pygmy Angelfish
A tiny deep-blue western-Atlantic dwarf angelfish with a bright yellow-orange face.
reef