Which of the following fishes lack claspers, used for internal fertilization in cartilaginous fishes ?
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Air bladder in fishes does not help in
The flying fish Exocoetus belongs to the class
The pair of fins seen on either side of cloaca of fishes are the
A muscular fin, aiding in propulsion is
In a fish aquarium green aquatic plants are grown for
Water into the gills of fishes passes through
The pair of fins found near the operculum in bony fishes is known as
Most venomous fish is
Cod liver oil is a rich source of
Homocercal tail fin with symmetrical upper and lower lobes is present in
Which one of the cartilaginous fishes posses an operculum over the gill ?
Mermaid purse is
Air baldder in fishes does not help in
Parental care is a characteristic of
An anamniote group is
Which of the following is a Shark ?
A group of cartilaginous fishes specialised for bottom dwelling is
Torpedo is a name for
A well developed swim bladder is seen in fishes which
Sharks and rays can be distinguished by
In Scoliodon, the thermoreceptors are
Heterocercal tail fin is a characteristic of which group of fishes?
The saw fish Pristis is a member of the class
Torpedo, the electric ray, could give a shock of about
Anandromous fishes are those which
Pectoral fins are not clearly marked off from the body in
Which of the following is not characteristic of chondricthyes ?
The function of swim bladder in fishes is mainly
In fishes, the lateral line receptors are
Study of sharks and rays is known as
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