Teleostei splits into Elopocephalai and Osteoglossocephalai. There are four orders in Elopocephalai. Osteoglossocephalai splits into Osteoglossocephala and Clupeocephala. There are two orders in Osteoglossocephala. Clupeocephala splits into Otomorpha and Euteleosteomorpha. Euteleosteomorpha will be explored in the following pages. Otomorpha further splits into two orders plus Ostariophysi. Ostariophysi contains the order Gonorhynchiformes and the group Otophysa. Otophysa splits into the order Cypriniformes and the group Characiphysae, which contains three orders.
- Teleostei
- Elopocephalai
- Elopocephala
- Elopomorpha
- Albuliformes - Bone Fishes
- Anguilliformes - Eels
- Notacanthiformes - Spiny Eels
- Elopiformes - Tarpons
- Osteoglossocephalai
- Osteoglossocephala
- Osteoglossomorpha
- Hiodontiformes
- Osteoglossiformes - Bonytongues, etc.
- Clupeocephala (34-V-B)
- Otomorpha
- Alepocephaliformes
- Clupeiformes - Herrings, etc.
- Ostariophysi
- Gonorhychiformes - Shellears, etc.
- Otophysa
- Cypriniformes - Suckers, etc.
- Characiphysae (34-V-C)
- Characiformes - Tetras, Piranhas, etc.
- Gymnotiformes - Electric Eels, etc.
- Siluriformes - Catfishes
- Euteleosteomorpha (next page, 34-VI)
The order of Bonefishes. As of 2024, 4 species of Albuliformes have been observed in iNaturalist in the US and 12 throughout the world.
- FAMILY ALBULIDAE
- Bonefish (Albula vulpes) - most iNat observations in the US for Albuliformes - 2 (Florida Keys), Springfield Wildlife Museum
The order of Eels. As of 2024, 62 species of Anguilliformes have been observed in iNaturalist in the US and 300 throughout the world.
- FAMILY PROTOANGUILLIDAE -
- Palauan Primitive Cave Eel (Protanguilla palau)
- SUBORDER ANGUILLOIDEI
- FAMILY ANGUILLIDAE - FRESHWATER EELS
- American Eel (Anguilla rostrata) - most iNat observations in the US for Anguilliformes - Chesapeake, Shedd Aquarium, Adirondacks, Kansas
- FAMILY HETERENCHELYIDAE - MUD EELS
- Pacific Mud Eel (Pythonichthys asodes)
- FAMILY MORINGUIDAE - SPAGHETTI EELS
- Spaghetti Eels (Moringua spp.)
- SUBORDER CONGROIDEI
- FAMILY COLOCONGRIDAE - SHORTTAIL CONGER EELS
- Colocongrids (Coloconger spp.)
- FAMILY CONGRIDAE - CONGER EELS
- Spotted Garden Eel (Heteroconger bassi) - 6 (KC & Omaha Zoos), 8 (Shedd)
- FAMILY DERICHTHYIDAE - LONGNECK EELS
- Longneck Eels (Derichthys spp.)
- FAMILY MURAENESOCIDAE - PIKE CONGERS
- Pike Conger (Cynoponticus sp.)
- FAMILY NEMICHTHYIDAE - SNIPE EELS
- Slender Snipe Eel (Nemichthys scolopaceus)
- FAMILY NETTASTOMATIDAE - DUCKBILL EELS
- Duckbill Eel (Leptocephalus sp.)
- FAMILY OPHICHTHIDAE - SNAKE EELS
- FAMILY SERRIVOMERIDAE - SAWTOOTH EELS
- FAMILY SYNAPHOBRANCHIDAE - CUTTHROAT EELS
- SUBORDER MURAENOIDEI
- FAMILY CHLOPSIDAE - FALSE MORAYS
- FAMILY MURAENIDAE - MORAY EELS
- Starry Moray (Echidna nebulosa) - 6 (Denver Zoo)
- Honeycomb Moray (Gymnothorax favagineus) - 6 (KC & Omaha Zoos)
- Green Moray Eel (Gymnothorax funebris) - Florida Keys
- Whitemouth Moray (Gymnothorax meleagris) - most iNat observations in the US for suborder Muraenoidei - 12 (Hawaii)
- California Moray Eel (Gymnothorax mordax) - 6 (KC & Omaha Zoos), 7 (Monterey Bay Aquarium), 8 (Shedd)
- Zebra Moray (Gymnomuraena zebra) - Monterey Bay Aquarium
- FAMILY MYROCONGRIDAE
- Red Eel (Myroconger spp.)
- SUBORDER SACCOPHARYNGOIDEI
- FAMILY CYEMATIDAE - BOBTAIL SNIPE EELS
- FAMILY EURYPHARYNGIDAE - GULPERS
- Gulper Eel (Eurypharynx pelecanoides)
- FAMILY MONOGNATHIDAE - ONEJAWS
- FAMILY SACCOPHARYNGIDAE - SWALLOWERS
The order of Spiny Eels. As of 2024, 0 species of Notacanthiformes have been observed in iNaturalist in the US and 8 throughout the world.
- FAMILY HALOSAURIDAE
- Halosaurs (Halosaurus sp.)
- FAMILY NOTACANTHIDAE
- Spiny Eels (Notacanthus spp.) - (Worldwide Deep Sea, depths of 125-2500m, temperate zones)
The order of Tarpons and Tenpounders. As of 2024, 3 species of Elopiformes have been observed in iNaturalist in the US and 8 throughout the world.
- FAMILY ELOPIDAE
- FAMILY MEGALOPIDAE
- Atlantic Tarpon (Megalops atlanticus) - most iNat observations in the US for Elopiformes - (Florida Keys, Florida Aquarium, Shedd Aquarium)
The order of Mooneyes. As of 2024, 2 species of Hiodontiformes have been observed in iNaturalist in the US and 2 throughout the world. Mooneyes are endemic to North America, found predominantly in the Mississippi River basin and the Great Lakes watershed.
- FAMILY HIODONTIDAE - MOONEYES
- Goldeye (Hiodon alosoides) - 6 (Missouri, Kansas and Platte Rivers)
- Mooneye (Hiodon tergisus) - 8 (Madison and Wisconsin Dells, WI area)
The order of Bonytongues. As of 2024, just one species of Osteoglossiformes has been observed in iNaturalist in the US and it was introduced into South Florida. 79 species have been observed throughout the world.
- SUBORDER NOTOPTEROIDEI
- SUPERFAMILY MORMYROIDEA
- FAMILY GYMNNARCHIDAE
- Nile Knifefish (Gymnarchus niloticus) - 8 (Shedd)
- FAMILY MORMYRIDAE - ELEPHANTFISHES
- Elephant Fish (Gnathonemus petersii)
- SUPERFAMILY NOTOPTEROIDEA
- FAMILY NOTOPTERIDAE - FEATHERBACKS
- Clown Knifefish (Chitala ornata) - only US observations for Osteoglossiformes - NOAH NCBI - SCZ
- SUBORDER OSTEOGLOSSOIDEI
- FAMILY OSTEOGLOSSIDAE - BONY TONGUES
- Silver Arawana (Osteoglossum bicirrhosum) - 6 (Omaha Zoo)
- Arapaima (Arapaima gigas) - 6 (Omaha Zoo)
- FAMILY PANTODONTIDAE - BUTTERFLYFISH
- Freshwater Butterfly Fish (Pantodon buchholzi)
The order of Slickheads and Tubeshoulders. As of 2024, 0 species of Alepocephaliformes have been observed in iNaturalist in the US and 19 throughout the world.
- FAMILY ALEPOCEPHALIDAE - SLICKHEADS
- Bluntsnout Slickhead (Xenodermichthys copei) - most iNat observations in the US for Alepocephaliformes
- Agassiz' Slickhead (Alepocephalus agassizii)
- FAMILY LEPTOCHILICHTHYIDAE
- FAMILY PLATYTROCTIDAE - TUBESHOULDERS
The order of Herrings. As of 2024, 32 species of Clupeiformes have been observed in iNaturalist in the US and 158 throughout the world.
- FAMILY CHIROCENTRIDAE
- FAMILY CLUPEIDAE - HERRINGS, SHADS
- Gizzard Shad (Dorosoma cepedianum) - most iNat observations in the US for Clupeiformes
- Alewife (Alosa pseudoharengus) - 8 (Lake Michigan)
- Atlantic Menhaden (Brevoortia tyrannus)
- Skipjack Herring (Alosa chrysochloris)
- Atlantic Herring (Clupea harengus)
- FAMILY DENTICIPITIDAE
- FAMILY ENGRAULIDAE - TRIP 2
- Common Anchovies (Anchoa spp.) - 2 (Florida Keys)
- Northern Anchovy (Engraulis mordax)
- FAMILY PRISTIGASTERIDAE
- FAMILY SUNDASALANGIDAE - SUNDALAND NOODLEFISHES
- Dwarf Noodlefish (Sundasalanx praecox)
The order of Milkfishes. As of 2024, 1 species of Gonorhychiformes has been observed in iNaturalist in the US and 10 throughout the world.
- SUBORDER CHANOIDEI
- FAMILY CHANIDAE
- Milkfish (Chanos chanos) - only iNat observations in the US for Gonorhychiformes - 8 (Shedd), 12 (Hawaii)
- SUBORDER GONORYNCHOIDEI
- FAMILY GONORYNCHIDAE -
- Beaked Salmons (Gonorynchus spp.)
- FAMILY KNERIIDAE -
- FAMILY PHRACTOLAEMIDAE -
- Hingemouth (Phractolaemus ansorgii)
The order of Minnows and allies. As of 2024, 343 species of Cypriniformes have been observed in iNaturalist in the US and 1,484 throughout the world.
- SUBORDER CATOSTOMOIDEI - 1 Family
- FAMILY CATOSTOMIDAE - SUCKERS
- White Sucker (Catostomus commersonii)
- Redhorses (Moxostoma spp.) - (Kansas)
- Buffalos (Ictiobus spp.) - (Kansas)
- Carpsuckers (Carpiodes spp.) - (Kansas)
- SUBORDER COBITOIDEI - 9 Families
- FAMILY BOTIIDAE
- Almorha Loach (Botia almorhae) - 8 (Shedd)
- Clown Loach (Chromobotia macracanthus) - 8 (Shedd)
- SUBORDER CYPRINOIDEI - 12 Families
- FAMILY CYPRINIDAE
- Common Carp (Cyprinus carpio) - most iNat observations in the US for Cypriniformes. Introduced. - Perry Lake, KS
- Redtail Sharkminnow (Epalzeorhynchos bicolor) - 8 (Shedd)
- Panda Garra (Garra flavatra) - 8 (Shedd)
- Golden Shiner (Notemigonus crysoleucas) - 6 (SCZ)
- Goldfish (Carassius auratus) - (Common Aquarium Fish)
- Topeka Shiner (Notropis topeka) - (Kansas)
- FAMILY LEUCISCIDAE
- Creek Chub (Semotilus atromaculatus) - most native iNat observations in the US for Cypriniformes
- SUBORDER GYRINOCHEILOIDEI - 1 Family
- FAMILY GYRINOCHEILIDAE - ALGAE EATERS
- Algae Eater (Gyrinocheilus aymonieri) - SE Asia and Borneo
The order of Characins. As of 2024, 5 species of Characiformes have been observed in iNaturalist in the US (3 introduced) and 593 throughout the world.
- SUBORDER CHARACOIDEI - 21 Families
- FAMILY ALESTIDAE
- Yellowtail Tetra (Alestopetersius caudalis) - 8 (Shedd)
- FAMILY ANOSTOMIDAE - HEADSTANDERS
- Striped Leporinus (Leporinus fasciatus) - 6 (Omaha Zoo)
- FAMILY CHARACIDAE - CHARACINS
- Texan Tetra (Astyanax argentatus) - most iNat observations in the US for Characiformes
- Mexican Blind Cave Fish (Astyanax mexicanus) - 6 (SCZ and Omaha Zoo), Roswell, NM
- Piranha (Pygocentrus nattereri) - NOAH - Peru, Tulsa Zoo
- Neon Tetra (Paracheirodon innesi) - (Common Aquarium Fish)
- Cardinal Tetra (Paracheirodon axelrodi) - (Common Aquarium Fish)
- FAMILY SERRASALMIDAE
- Geryi's Violet Line Piranha (Serrasalmus geryi) - 8 (Shedd)
- SUBORDER CITHARINOIDEI - 2 Families
- FAMILY CITHARINIDAE - CITHARINES
The order of Neotropical Knifefishes. As of 2024, 0 species of Gymnotiformes have been observed in iNaturalist in the US and 61 throughout the world, all in South and lower Central America.
- FAMILY APTERONOTIDAE - GHOST KNIFEFISHES
- Tube-Snouted Ghost Knifefish (Sternarchorhynchus mesensis)
- FAMILY EIGENMANNIIDAE
- FAMILY ELECTROPHORIDAE
- Electric Eel (Electrophorus electricus) - 8 (Shedd)
- FAMILY GYMNOTIDAE - NAKED-BACK KNIFEFISHES
- Banded Knifefish (Gymnotis carapo) - most iNat observations in the world for Gymnotiformes
- FAMILY STERNOPYGIDAE
- SUPERFAMILY RHAMPHICHTHYOIDEA
- FAMILY HYPOPOMIDAE
- FAMILY RHAMPHICHTHYIDAE
The order of Catfishes. As of 2024, 51 species of Siluriformes have been observed in iNaturalist in the US and 944 throughout the world.
- SUBORDER DIPLOMYSTOIDEI
- SUBORDER LORICARIOIDEI - 6 Families
- FAMILY CALLICHTHYIDAE - CALLICHTHYID ARMORED CATFISHES
- Peppered Catfish (Hoplisoma paleatus) - 8 (Shedd)
- FAMILY LORICARIIDAE - SUCKERMOUTH ARMORED CATFISHES
- Suckermouth Catfish/Plecostomus (Hypostomus plecostomus) - 6 (SCZ and Omaha Zoo)
- FAMILY NEMATOGENYIDAE
- Mountain Catfish (Nematogenys inermis) - (South America)
- FAMILY TRICHOMYCTERIDAE - PENCIL CATFISHES
- Candiru (Vandellia cirrhosa) - (South America) - Called "Spiky Candiru" in the movie Medicine Man. Has been known to swim into the urethra of humans urinating in the water.
- SUBORDER SILUROIDEI - 30 Families
- FAMILY ARIIDAE - SEA CATFISHES
- Gafftopsail Catfish (Bagre marinus) - 2 (Florida)
- FAMILY DORADIDAE - THORNY CATFISHES
- Ripsaw Catfish (Oxydoras niger) - 6 (Omaha Zoo)
- FAMILY ICTALURIDAE - BULLHEAD CATFISHES
- Channel Catfish (Ictalurus punctatus) - most iNat observations in the US for Siluriformes
- Bullhead Catfishes (Ameiurus spp.)
- Blue Catfish (Ictalurus furcatus)
- Madtoms (Noturus spp.) - Smokies
- Flathead Catfish (Pylodictis olivaris)
- FAMILY MALAPTERURIDAE - ELECTRIC CATFISHES
- Electric Catfish (Malapterurus electricus) - 8 (Shedd)
- FAMILY PIMELODIDAE - LONG-WISKERED CATFISHES
- Tiger Shovelnose Catfish (Pseudoplatystoma fasciatum) - 6 (Omaha Zoo)
- FAMILY SCHILBEIDAE - SCHILBID CATFISHES
- Smokey Catfish (Schilbe mystus) - 8 (Shedd)
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