all types fishes
only cartilaginous fishes
only bony fishes
sea dwelling fishes
C. only bony fishes
a rounded body with ventral gill clefts
a flattened body with dorsal gill clefts
a flattened body with ventral gill clefts
any of these
live at the bottom of rivers
live in shallow streams
are active swimmers
live in sea water
Shark
Cod
Amia
Both (a) and (b)
Dipnoi
Osteichthyes
Cyclostomata
Chondrichthyes
having gills not covered by operculum
presence of lateral line system
presence of large scales
presence of terminal mouth
Saurology
Traumatology
Torpedology
Ichthyology
sharks
rays
whales
lung fishes
sharks
whales
lung fishes
rays
dog fish
bony fishes
both (a) and (b)
all fishes
cat fish
dog fish
flying fish
seahorse
all types fishes
only cartilaginous fishes
only bony fishes
sea dwelling fishes
electric fish
saw fish
stone fish
dog fish
Trygon
Torpedo
Chimaera
Sphynta
lungs
air bladders
cartilaginous skeleton
fins
Oxygen
Carbon dioxide
Fish food
Decoration
teleosts
sharks
lung fishes
rays
hippocampus
labeo
anabes
none of these
Five pairs of gills covered with operculum
Homocercal tail
Eight pairs of gills
Any of these
sound production
respiratory
locomotion
hydrostatic
respiration
sound production
excretion
movement
a shell
egg case of skate fishes
a colony of skate fishes
none of these
Dasyatis
Chimaera
Sphyma
Torpedo
Coelocanth
Diodon
Sturgeon
Labeo
Placoid scales
Ventral mouth
Operculum
Five pairs of gill slits
anterior fins
ray fins
pectoral fins
paired fins
cartilaginous fishes
bony fishes
both (a) and (b)
all fishes except sharks
Placoid scales
Heterocercal tail fin
Ventrally placed mouth
Operculum
the nature of their scales
the position of the mouth
the position of gill slits
the kind of the tail fin
respiration
excretion
movement
none of these
dorsal
ventral
caudal
pelvic