pelvic fins
cloacal fins
anal fins
caudal fins
A. pelvic fins
cartilaginous fishes
bony fishes
lung fishes
paleontological fishes
Whale
Tadpole
Aquatic urodeles
Common Indian dog fish
Oxygen
Carbon dioxide
Fish food
Decoration
Dasyatis
Chimaera
Sphyma
Torpedo
Saurology
Traumatology
Torpedology
Ichthyology
Dipnoi
Osteichthyes
Cyclostomata
Chondrichthyes
anterior fins
ray fins
pectoral fins
paired fins
sharks
whales
lung fishes
rays
live at the bottom of rivers
live in shallow streams
are active swimmers
live in sea water
dorsal
ventral
caudal
pelvic
cat fish
dog fish
flying fish
seahorse
Trygon
Torpedo
Chimaera
Sphynta
the nature of their scales
the position of the mouth
the position of gill slits
the kind of the tail fin
placoid
cycloid
ctenoid
rhombiod
10 volts
100 volts
50 volts
150 volts
Shark
Cod
Amia
Both (a) and (b)
a rounded body with ventral gill clefts
a flattened body with dorsal gill clefts
a flattened body with ventral gill clefts
any of these
Five pairs of gills covered with operculum
Homocercal tail
Eight pairs of gills
Any of these
sound production
respiratory
locomotion
hydrostatic
electric fish
saw fish
stone fish
dog fish
ampullae of lorenzini
lateral line system
stato-acoustic organs
neuromast organs
respiration
excretion
movement
none of these
Scoliodon
Electric ray
Whale
Lung fish
sawfish
seahorse
electric ray
sucker fish
Coelocanth
Diodon
Sturgeon
Labeo
Endoderm
Mesoderm
Ectoderm
Integument
live in sea water and migrate to fresh water rivers and lakes for breeding
live in fresh water and migrate to sea for breeding
both (a) and (b)
none of these
teleosts
sharks
lung fishes
rays
having gills not covered by operculum
presence of lateral line system
presence of large scales
presence of terminal mouth
pharyngeal gills
paired fins
dermal scales
all of these