Fish Practical Flashcards
Petromyzontiformes
Lampreys
No paired fins
Long dorsal fin continuous with caudal fin
No ventral fin anterior to anus
No barbels
7 pairs of gill openings
Larval form: ammocoetes
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/710/736/a_image_thumb.png?1452644960)
Myxiniformes
Hagfish** & **Slime hags
No paired fins
Ventral fin anterior to anus present
Barbels present
External gill slits ~14
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/711/458/a_image_thumb.png?1452645490)
Squaliformes
Sharks
Placoid scales
Heterocercal tail
Spiracle present
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/711/905/a_image_thumb.png?1452645727)
Rajiformes
Skates** & **Rays
Dorsoventrally flattened
Spiracle functions in respiration
Skates: thick tail; Rays: whiplike tail
Males have claspers
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/712/319/a_image_thumb.png?1452646122)
Chimaeriformes
Chimaeras** or **Ratfish**, **Rabbitfish
Beaklike jaw/tooth plates
Tail long and thin
Locomation by large pectoral fins
Single external gill opening with opercular flap
Ugly
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/712/807/a_image_thumb.png?1452646425)
Amocoetes larva
Lampreys
Dipnoi
Lungfish
Paired fins
Diphycercal tail
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/713/700/a_image_thumb.png?1452646825)
Polypteriformes
Bichirs** & **Reed fish
Dorsal finlets; fleshy base to pectoral fin
Ganoid scales: tough, heavy
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/713/939/a_image_thumb.png?1452647162)
Polyodontidae
Paddlefish
Elongated & flattened rostrum (nose), 1/3 length
Skin essentially naked (i.e., no scales) except at caudal peduncle
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/714/569/a_image_thumb.png?1452647322)
Acipenseridae
Stergeon
Bony plate along sides as “armor”
Barbels present
Heterocercal tail
Ducklike snout
Source of caviar
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/714/820/a_image_thumb.png?1452647469)
Lepisosteidae
Gars** or **Garpikes
Ganoid scales
Elongate cylindrical body; elongate snout
Anal & dorsal fins well back on body
Sit & wait predators
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/714/954/a_image_thumb.png?1452647618)
Amiidae
Bowfin
Cycloid scales
“Eye spot” on caudal fin; asymmetric
Long dorsal fin
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/715/802/a_image_thumb.png?1452647922)
Anguillidae
Common eels
Has pectoral fins (lamphrey & hagfish do not)
Pelvic fins absent; snake-like form
Scales minute & imbedded
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/716/097/a_image_thumb.png?1452648112)
Clupeiformes
Herring**, **shad**, **menhadden**, **alewives
Body latterally compressed; forked tail; head lack scales; no adipose fin
Ventral scales keeled, giving “sawtooth fringe”
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/716/439/a_image_thumb.png?1452648599)
Salmonidae
Salmon**, **trout**, **whitefish
Adipose fin; forked tail
Pelvic fins with axillary process
No barbels
![](https://s3.amazonaws.com/brainscape-prod/system/cm/175/718/117/a_image_thumb.png?1452648969)