Lab Practical 1

1. Total length (TL)

2. Fork length (FL)

3. Pre caudal length (PCL)

Spiracle

1. Anterior dorsal fin

2. posterior dorsal fin

3. Pelvic fin

1. Pectoral fin

2. pelvic fin

3. caudal fin

Placoid scales

ctenoid scales

a. Spiny dorsal fin

b. Soft dorsal fin

Cauel peduncle

What measurement is often used for marine fishes?

Fork length

What measurment is commonly used for freshwater fishes?

total length

1. gas bladder

2. kidney

3. ovary

1. Stomach

2. heart

3. liver

a. gill lamellae

b. gill rakers

Scyliorhinus retifer (Chain dogfish/chain cat shark); cool pattern

Squalas acanthias (Spiny dogfish); no anal fin

Mustelus canis (Smooth dogfish); anal fin present

Leucoraja ocellata (winter skate); small eye-like dots or ocelli

Leucoraja erinacea (little skate)

Raja eglanteria (clearnose skate)

Carcharhinus obscurus (Dusky shark); draw a line in from of the anterior dorsal fin and if the pectoral fin is in front = dusky

Carcharhinus plumbeus (Sandbar); draw a line in front of the posteriod dorsal fin and if the pelvic fin intersects = sandbar

Alopias vulpinas (Thresher shark); long caudal upper lobe = to length of the body

Isurus oxyrinchus (Short fin mako shark)

Petromyzon marinus (Sea Lamprey); no jaw

Anguilla rostrata (American Eel)

Morone americana (White Perch); look for notched tail and domed back

Morone saxitilis (Striped Bass); very distict stripes

Centropristis striata (Black Sea Bass); look for dark color

Pomatomus saltatrix (Bluefish); silver color and small spiny dorsal fin

Paralichthys dentatus (Summer Flounder or left eyed flounder)

Pseudopleuronectes americanus (Winter Flounder or right eyed flounder)

Sphoeroides maculatus (Northern Puffer); look for beak

Cynosion regalis (Weakfish)

Menticirrhus saxatilis (Northern Kingfish); distinct barring

Opsanus tau (Oyster Toadfish); look for barbels

Prionotus carolinus (Northern Searobin)

Gadus morhua (Atlantic Cod); has speckles and distinct white lateral line

Scomber scombrus (Atlantic Mackerel); distinct barrings and blue green color

Scomberomorus maculatus (Spanish Mackerel); no barring but is speckled

Sygnathus fuscus (Northern Pipefish)