A fish is characterised by the presence of
all of these
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Which of the following is not true about bony fishes ?
The pair of fins seen on either side of cloaca of fishes are the
Heterocercal tail fin is a characteristic of which group of fishes?
Air baldder in fishes does not help in
Fish scales originate from one of the following?
A muscular fin, aiding in propulsion is
Mermaid purse is
A well developed swim bladder is seen in fishes which
A group of cartilaginous fishes specialised for bottom dwelling is
Homocercal tail fin with symmetrical upper and lower lobes is present in
Parental care by males is found in
The flying fish Exocoetus belongs to the class
The fish used to control spread of malaria is
Which of the following fishes lack claspers, used for internal fertilization in cartilaginous fishes…
In fishes, the lateral line receptors are
Air bladder in fishes does not help in
The tympanum is absent in
Salmon is an example of
Chondricthyes is not characterised by the presence of
Study of sharks and rays is known as
Which of the following is a Shark ?
The saw fish Pristis is a member of the class
Pectoral fins are not clearly marked off from the body in
Which of the following is not characteristic of chondricthyes ?
Chondrichthyes differs from Osteichthves in
Anandromous fishes are those which
Cod liver oil is a rich source of
In a fish aquarium green aquatic plants are grown for
Sea horse is a
In Scoliodon, the thermoreceptors are
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