Question

Is operculum present in cyclostomes?

Answer 1

Operculum:

1. The operculum is a series of bones present in bony fish and chimeras that act as facial support structures and protect the gills.
2. It is used for feeding and respiration.

Cyclostomes:

1. Cyclostomes are jawless fishes such as lampreys and hagfishes.
2. These have jawless mouth along with horny epidermal structures that act as teeth called ceratodones which help in consuming food.
3. These do not have an operculum.