live at the bottom of rivers
live in shallow streams
are active swimmers
live in sea water
C. are active swimmers
electric fish
saw fish
stone fish
dog fish
Placoid scales
Heterocercal tail fin
Ventrally placed mouth
Operculum
Placoid scales
Ventral mouth
Operculum
Five pairs of gill slits
Trygon
Torpedo
Chimaera
Sphynta
anterior fins
ray fins
pectoral fins
paired fins
Whale
Tadpole
Aquatic urodeles
Common Indian dog fish
Coelocanth
Diodon
Sturgeon
Labeo
a rounded body with ventral gill clefts
a flattened body with dorsal gill clefts
a flattened body with ventral gill clefts
any of these
sharks
whales
lung fishes
rays
teleosts
sharks
lung fishes
rays
olfactoreceptors
rheoreceptors
gustoreceptors
chemoreceptors
dorsal
ventral
caudal
pelvic
Five pairs of gills covered with operculum
Homocercal tail
Eight pairs of gills
Any of these
placoid
cycloid
ctenoid
rhombiod
cat fish
dog fish
flying fish
seahorse
live at the bottom of rivers
live in shallow streams
are active swimmers
live in sea water
sharks
rays
whales
lung fishes
Dipnoi
Osteichthyes
Cyclostomata
Chondrichthyes
respiration
sound production
excretion
movement
dog fish
bony fishes
both (a) and (b)
all fishes
ampullae of lorenzini
lateral line system
stato-acoustic organs
neuromast organs
sawfish
seahorse
electric ray
sucker fish
vitamin A
iron
calcium
vitamin B complex
Oxygen
Carbon dioxide
Fish food
Decoration
Scoliodon
Electric ray
Whale
Lung fish
all types fishes
only cartilaginous fishes
only bony fishes
sea dwelling fishes
mollusc
mammal
star fish
bony fish
a shell
egg case of skate fishes
a colony of skate fishes
none of these
lungs
air bladders
cartilaginous skeleton
fins
Shark
Cod
Amia
Both (a) and (b)