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.
Zebrafish
A small, striped South Asian minnow renowned worldwide as a key model organism for genetics and developmental biology research, alongside its popularity as an aquarium fish.
freshwaterZebra Danio
A small, torpedo-shaped freshwater fish famous for the bold horizontal blue and gold stripes running the length of its body, and widely used as a model species in scientific research.
freshwater
Red Lionfish
Instantly recognizable for its fan-like, striped fins and venomous spines, the red lionfish is a native Indo-Pacific reef predator that has become a damaging invasive species in the Western Atlantic.
reefLeopard Danio
A spotted color morph of the Zebrafish, the Leopard Danio trades horizontal stripes for a striking pattern of dark spots across a golden body.
freshwater
Brook Lamprey
The brook lamprey is a small, non-parasitic freshwater lamprey of Pacific Northwest streams that never feeds as an adult, spending most of its life buried as a filter-feeding larva.
freshwater
Western Brook Lamprey
The western brook lamprey is a small, non-parasitic jawless fish that spends most of its life as a burrowing larva in Pacific Northwest streams before a brief, non-feeding adult stage.
freshwater
Far Eastern Brook Lamprey
A small, jawless, non-parasitic lamprey native to clear freshwater streams across Japan, Korea, and mainland East Asia, spending most of its life as a burrowing larva before a brief non-feeding adult stage.
freshwater
Gambusia
A small, hardy North American livebearer famous for its voracious appetite for mosquito larvae, widely introduced worldwide for mosquito control with significant ecological consequences.
freshwater
Mosquitofish
A small, drab livebearer native to the central and southeastern United States, the mosquitofish is famous for its voracious appetite for mosquito larvae and has been introduced worldwide for pest control.
freshwater
Ukrainian Brook Lamprey
The Ukrainian brook lamprey is a small, non-parasitic jawless fish that lives its entire life in freshwater streams of Eastern Europe, feeding only during a long larval stage.
freshwaterKorean Lamprey
The Korean lamprey is a small, non-parasitic jawless fish native to freshwater streams of the Korean Peninsula, feeding only during a long larval stage before a brief adult life.
freshwaterWhitefish
Lake whitefish are silvery, streamlined members of the salmon family that inhabit cold, deep lakes across North America, feeding along the bottom for insect larvae and small invertebrates.
freshwater