Vertebrates
Cartilaginous
Caudal Fin
Dorsal Fin
Demersal
Swim Bladder
Pelvic Fin
Spiracle
Ovoviviparous
Viviparous
FINS
PUPS
LIVER
warning coloration
disruptive coloration
countershading
claspers
Vertebrates
Tail
heterocercal
Demersal
swim bladder
gill rakers
cloaca
gas exchange
oviparous
ovoviviparous
viviparous
parthenogenesis
Hagfishes
lampreys
nostril
Eyes
Nostrils
Mouth
Spiracles
Anal Fin
Liver
Gallbladder
Pancreas
Esophagus
Duodenum
Gills
Spleen
heart
Sinus Venosus
Conus arteriosus
Kidneys
Testes
epididymis
Ovaries
Oviducts
Uterus
lamellae
counter
kidney
suckers
Lungfish
operculum
Swim bladder
External
one
liver
two
currents
high
Overlapping
Lunate
Swim bladder
Stomach
Liver
Swim bladder
Gonad
Kidney
Digestive gland
Heart
Intestine
Classification
Taxonomy
Systematics
Nomenclature
Cladistics
Apomorphies
Monophyletic groups
Parsimony
Cladogram
warning coloration
Cryptic coloration
disruptive
disruptive coloration