Placoid scales
Ventral mouth
Operculum
Five pairs of gill slits
C. Operculum
having gills not covered by operculum
presence of lateral line system
presence of large scales
presence of terminal mouth
live at the bottom of rivers
live in shallow streams
are active swimmers
live in sea water
Shark
Cod
Amia
Both (a) and (b)
sharks
whales
lung fishes
rays
a shell
egg case of skate fishes
a colony of skate fishes
none of these
nostrils
mouth
gill slits
swimming bladder
sound production
respiratory
locomotion
hydrostatic
Oxygen
Carbon dioxide
Fish food
Decoration
Scoliodon
Electric ray
Whale
Lung fish
anterior fins
ray fins
pectoral fins
paired fins
Placoid scales
Heterocercal tail fin
Ventrally placed mouth
Operculum
Whale
Tadpole
Aquatic urodeles
Common Indian dog fish
Dasyatis
Chimaera
Sphyma
Torpedo
Saurology
Traumatology
Torpedology
Ichthyology
teleosts
sharks
lung fishes
rays
dorsal
ventral
caudal
pelvic
Osteichthyes
Chondrichthyes
Dipnoi
Holocephali
ampullae of lorenzini
lateral line system
stato-acoustic organs
neuromast organs
cartilaginous fishes
bony fishes
both (a) and (b)
all fishes except sharks
anandromous migration
catadromous migration
cartilaginous fish
none of these
lungs
air bladders
cartilaginous skeleton
fins
mollusc
mammal
star fish
bony fish
hippocampus
labeo
anabes
none of these
Placoid scales
Ventral mouth
Operculum
Five pairs of gill slits
vitamin A
iron
calcium
vitamin B complex
pelvic fins
cloacal fins
anal fins
caudal fins
Pterois
Fistularia
Gambusia
None of these
pharyngeal gills
paired fins
dermal scales
all of these
respiration
sound production
excretion
movement
Endoderm
Mesoderm
Ectoderm
Integument