A homocercal tail is found in
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Heterocercal tail fin is a characteristic of which group of fishes?
The tympanum is absent in
Salmon is an example of
Torpedo, the electric ray, could give a shock of about
Which of the following does not have lateral line organs ?
Sea horse is a
A well developed swim bladder is seen in fishes which
Air baldder in fishes does not help in
A fish is characterised by the presence of
Cod liver oil is a rich source of
The flying fish Exocoetus belongs to the class
Which one of the cartilaginous fishes posses an operculum over the gill ?
Which of the following is not characteristic of chondricthyes ?
Parental care by males is found in
Pectoral fins are not clearly marked off from the body in
Fillibranch gills are present in
Placoid scales are found in
Which of the following is not true about bony fishes ?
Study of sharks and rays is known as
Homocercal tail fin with symmetrical upper and lower lobes is present in
Fish scales originate from one of the following?
Most venomous fish is
Which fish is famous for cod liver oil ?
Torpedo is a name for
In fishes, the lateral line receptors are
In Scoliodon, the thermoreceptors are
The pair of fins found near the operculum in bony fishes is known as
Which of the following fishes lack claspers, used for internal fertilization in cartilaginous fishes…
The pair of fins seen on either side of cloaca of fishes are the