killifish
Small ornamental swimmer
Killifish are small, brightly colored freshwater fish found worldwide, popular in aquariums.
The name likely comes from the Dutch word for creek or channel—these fish often inhabit shallow, sometimes temporary bodies of water.
Many species are prized by hobbyists for their vivid patterns and relative ease of breeding.
Non-saline aquatic environment
- streamsContinuous flows of something
- pondsSmall freshwater bodies
- wetlandsWater-saturated terrain
- bogsSoft, wet terrain
swamps · floodplains · brackish · estuary · tropical · subtropical · African · Asian
Occurring every year
- diapauseInsect developmental suspension
- peatWaterlogged decomposed vegetation
- eggReproductive cell in shell
- embryoOrganism before birth
dormancy · hatching · incubation · fry · oviparous · short-lived · generation
Limited in size
- hardyAble to endure difficulty
- adaptableAble to adjust readily
- resilientAble to recover quickly
- carnivorousFeeding on animal flesh
insectivore · jumping · peaceful · territorial · shy · beginner-friendly · robust
Large storage vessel
- aquascapingDesigning underwater tank environments
- substrateUnderlying supporting material
- filtrationSeparating solids from liquids
- heaterDevice producing warmth
Taxonomic rank above species
- speciesFinest taxonomic rank
- ichthyologyScientific study of piscine life
- annualOccurring every year
- classificationSystematic grouping by traits
Full of life, intensity
- iridescentShowing shifting spectral colors
- metallicResembling ore-based elements
- bluePrimary color; also sad
- redPrimary color, warm
orange · yellow · patterned · striped · spotted · male · displaying · pigmentation
freshwater
Non-saline aquatic environment
bogs · swamps · floodplains · brackish · estuary · tropical · subtropical · African · Asian · riparian
annual
Occurring every year
- diapauseInsect developmental suspension
- peatWaterlogged decomposed vegetation
- eggReproductive cell in shell
embryo · dormancy · hatching · incubation · fry · oviparous · short-lived · generation
small
Limited in size
carnivorous · insectivore · jumping · peaceful · territorial · shy · beginner-friendly · robust
tank
Large storage vessel
- aquascapingDesigning underwater tank environments
- substrateUnderlying supporting material
- filtrationSeparating solids from liquids
heater · thermometer · lighting · aquarist · hobbyist · lid · jumper
genus
Taxonomic rank above species
- speciesFinest taxonomic rank
- ichthyologyScientific study of piscine life
- annualOccurring every year
vibrant
Full of life, intensity
- iridescentShowing shifting spectral colors
- metallicResembling ore-based elements
- bluePrimary color; also sad
red · orange · yellow · patterned · striped · spotted · male · displaying · pigmentation · brilliant
- short-lived creaturesmayfly, fruit fly, gnat, mosquito, housefly
- aquarium petsgoldfish, guppies, tetras, neon tetra, bettas
- baitfishanchovy, menhaden, sardine, shiner, minnow
- Caribbean wildlifeshark, sharks, dolphin, whale, flamingo
- coastal fishredfish, snook, tarpon, bonefish, flounder
- estuary animalsmudskipper, fiddler crab, mud crab, oyster, barnacle
killifishwhale shark
Biggest fish species
blue whale · giant grouper · ocean sunfish · sturgeon · coelacanth
killifishgoldfish
Small orange pet carp
betta · guppy · angelfish · neon tetra