Definitions of malacopterygian
  1. noun
    any fish of the superorder Malacopterygii
    synonyms: soft-finned fish
    see moresee less
    acanthopterygian, spiny-finned fish
    a teleost fish with fins that are supported by sharp inflexible rays
    show 68 types...
    hide 68 types...
    Ostariophysi, order Ostariophysi
    in some classifications considered a superorder comprising the Cypriniformes and the Siluriformes
    cypriniform fish
    a soft-finned fish of the order Cypriniformes
    catfish, siluriform fish
    any of numerous mostly freshwater bottom-living fishes of Eurasia and North America with barbels like whiskers around the mouth
    gadoid, gadoid fish
    a soft-finned fish of the family Gadidae
    voracious snakelike marine or freshwater fishes with smooth slimy usually scaleless skin and having a continuous vertical fin but no ventral fins
    Gonorhynchus gonorhynchus, beaked salmon, sandfish
    fish of sandy areas of western Pacific and Indian oceans having an angular snout for burrowing into sand
    clupeid, clupeid fish
    any of numerous soft-finned schooling food fishes of shallow waters of northern seas
    small herring-like plankton-eating fishes often canned whole or as paste; abundant in tropical waters worldwide
    soft-finned fishes of cold and temperate waters
    silvery herring-like freshwater food fish of cold lakes of the northern hemisphere
    small trout-like silvery marine or freshwater food fishes of cold northern waters
    Tarpon atlanticus, tarpon
    large silvery game fish of warm Atlantic coastal waters especially off Florida
    Albula vulpes, bonefish
    slender silvery marine fish found in tropical mud flats and mangrove lagoons
    any of various small silver-scaled salmon-like marine fishes
    small fish having rows of luminous organs along each side; some surface at night
    lizardfish, snake-fish, snakefish
    tropical fishes with large mouths in lizard-like heads; found worldwide
    bottom-dwellers having large eyes with metallic green luster
    lancet fish, lancetfish, wolffish
    large elongate scaleless oceanic fishes with sharp teeth and a long dorsal fin that resembles a sail
    handsaw fish
    a soft-finned fish of the genus Alepisaurus
    Lampris regius, moonfish, opah
    large elliptical brightly colored deep-sea fish of Atlantic and Pacific and Mediterranean
    Lampris guttatus, New World opah
    from Nova Scotia to West Indies and Gulf of Mexico
    marine fish having a long compressed ribbonlike body
    Regalecus glesne, king of the herring, oarfish, ribbonfish
    thin deep-water tropical fish 20 to 30 feet long having a red dorsal fin
    slender freshwater fishes of Eurasia and Africa resembling catfishes
    cyprinid, cyprinid fish
    soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales
    Electrophorus electric, electric eel
    eel-shaped freshwater fish of South America having electric organs in its body
    a cypriniform fish of the family Catostomidae
    any member of the family Cyprinodontidae
    live-bearer, poeciliid, poeciliid fish, topminnow
    small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control
    silurid, silurid fish
    Old World freshwater catfishes having naked skin and a long anal fin more or less merged with the eellike caudal fin
    bullhead, bullhead catfish
    any of several common freshwater catfishes of the United States
    Ictalurus punctatus, channel cat, channel catfish
    freshwater food fish common throughout central United States
    Pylodictus olivaris, flathead catfish, goujon, mudcat, shovelnose catfish, spoonbill catfish
    large catfish of central United States having a flattened head and projecting jaw
    armored catfish
    South American catfish having the body covered with bony plates
    sea catfish
    any of numerous marine fishes most of which are mouthbreeders; not used for food
    cod, codfish
    major food fish of Arctic and cold-temperate waters
    Gadus merlangus, Merlangus merlangus, whiting
    a food fish of the Atlantic waters of Europe resembling the cod; sometimes placed in genus Gadus
    Melanogrammus aeglefinus, haddock
    important food fish on both sides of the Atlantic; related to cod but usually smaller
    Pollachius pollachius, pollack, pollock
    important food and game fish of northern seas (especially the northern Atlantic); related to cod
    any of several marine food fishes related to cod
    Molva molva, ling
    elongated marine food fish of Greenland and northern Europe; often salted and dried
    Brosme brosme, cusk, torsk
    large edible marine fish of northern coastal waters; related to cod
    grenadier, rattail, rattail fish
    deep-sea fish with a large head and body and long tapering tail
    young eel
    common eel, freshwater eel
    eels that live in fresh water as adults but return to sea to spawn; found in Europe and America; marketed both fresh and smoked
    Anguilla sucklandii, tuna
    New Zealand eel
    moray, moray eel
    family of brightly colored voracious eels of warm coastal waters; generally nonaggressive to humans but larger species are dangerous if provoked
    conger, conger eel
    large dark-colored scaleless marine eel found in temperate and tropical coastal waters; some used for food
    herring-like food fishes that migrate from the sea to fresh water to spawn
    Alosa pseudoharengus, Pomolobus pseudoharengus, alewife
    shad-like food fish that runs rivers to spawn; often salted or smoked; sometimes placed in genus Pomolobus
    Brevoortia tyrannis, menhaden
    shad-like North American marine fishes used for fish meal and oil and fertilizer
    Clupea harangus, herring
    commercially important food fish of northern waters of both Atlantic and Pacific
    any of various small edible herring or related food fishes frequently canned
    Sardina pilchardus, pilchard, sardine
    small fishes found in great schools along coasts of Europe; smaller and rounder than herring
    Engraulis encrasicholus, mediterranean anchovy
    esteemed for its flavor; usually preserved or used for sauces and relishes
    any of various large food and game fishes of northern waters; usually migrate from salt to fresh water to spawn
    any of various game and food fishes of cool fresh waters mostly smaller than typical salmons
    char, charr
    any of several small trout-like fish of the genus Salvelinus
    Coregonus clupeaformis, lake whitefish
    found in the Great Lakes and north to Alaska
    Coregonus artedi, cisco, lake herring
    important food fish of cold deep lakes of North America
    Menominee whitefish, Prosopium cylindraceum, round whitefish
    a whitefish with a bronze back; of northern North America and Siberia
    Prosopium williamsonii, Rocky Mountain whitefish
    whitefish of the western United States and Canada
    Osmerus mordax, rainbow smelt
    important marine and landlocked food fish of eastern North America and Alaska
    European smelt, Osmerus eperlanus, sparling
    the common smelt of Europe
    capelan, capelin, caplin
    very small northern fish; forage for sea birds and marine mammals and other fishes
    Elops saurus, ladyfish, tenpounder
    game fish resembling the tarpon but smaller
    Trachipterus arcticus, dealfish
    deep-sea ribbonfish
    characid, characin, characin fish
    any freshwater fish of the family Characinidae
    type of:
    teleost, teleost fish, teleostan
    a bony fish of the subclass Teleostei
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week