The pair of fins found near the operculum in bony fishes is known as
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Air baldder in fishes does not help in
Torpedo is a name for
The pair of fins seen on either side of cloaca of fishes are the
A group of cartilaginous fishes specialised for bottom dwelling is
Placoid scales are found in
Sharks and rays can be distinguished by
The tympanum is absent in
Cod liver oil is a rich source of
Which of the following is not true about bony fishes ?
Parental care is a characteristic of
Parental care by males is found in
Salmon is an example of
Water into the gills of fishes passes through
Fillibranch gills are present in
Heterocercal tail fin is a characteristic of which group of fishes?
The flying fish Exocoetus belongs to the class
A fish is characterised by the presence of
In a fish aquarium green aquatic plants are grown for
In Scoliodon, the thermoreceptors are
Which of the following is a Shark ?
Which of the following does not have lateral line organs ?
Pectoral fins are not clearly marked off from the body in
Fish scales originate from one of the following?
Fishes swim in water because they have
Torpedo, the electric ray, could give a shock of about
A homocercal tail is found in
Chondricthyes is not characterised by the presence of
Homocercal tail fin with symmetrical upper and lower lobes is present in
Anandromous fishes are those which
Which of the following fishes lack claspers, used for internal fertilization in cartilaginous fishes…
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