Which one can help improve dental hygiene?

The stage of fish when a mouth is absent

Antiseptic properties are found in the leaves of

Three carp fishes, Catla Labeo and Cirrhina, can be grown together in the same pond more economically as they have

Crustacean fishery is connected with exploitation of

Red pigment (leghaemoglobin) having affinity for oxygen is present in the roots of

Vermicompost is biofertilizer which is rich in

Which is purely a capture type of fishery

A medicine for bronchitis is got from

Which of the following is not obtained from sea water