Pterois
Fistularia
Gambusia
None of these
C. Gambusia
Whale
Tadpole
Aquatic urodeles
Common Indian dog fish
10 volts
100 volts
50 volts
150 volts
placoid
cycloid
ctenoid
rhombiod
Saurology
Traumatology
Torpedology
Ichthyology
Scoliodon
Electric ray
Whale
Lung fish
Pterois
Fistularia
Gambusia
None of these
cartilaginous fishes
bony fishes
lung fishes
paleontological fishes
electric fish
saw fish
stone fish
dog fish
pelvic fins
cloacal fins
anal fins
caudal fins
mollusc
mammal
star fish
bony fish
sawfish
seahorse
electric ray
sucker fish
teleosts
sharks
lung fishes
rays
Osteichthyes
Chondrichthyes
Dipnoi
Holocephali
respiration
excretion
movement
none of these
cat fish
dog fish
flying fish
seahorse
Dasyatis
Chimaera
Sphyma
Torpedo
having gills not covered by operculum
presence of lateral line system
presence of large scales
presence of terminal mouth
Placoid scales
Heterocercal tail fin
Ventrally placed mouth
Operculum
nostrils
mouth
gill slits
swimming bladder
lungs
air bladders
cartilaginous skeleton
fins
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
olfactoreceptors
rheoreceptors
gustoreceptors
chemoreceptors
sharks
whales
lung fishes
rays
dorsal
ventral
caudal
pelvic
cartilaginous fishes
bony fishes
both (a) and (b)
all fishes except sharks
Five pairs of gills covered with operculum
Homocercal tail
Eight pairs of gills
Any of these
respiration
sound production
excretion
movement
pharyngeal gills
paired fins
dermal scales
all of these
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