Question

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Shortnote on “CYCLOSTOMATA ”
(in 150 words)​​

Answer 1

Answer:

Cyclostomata is a group of agnathans that comprises the living jawless fishes: the lampreys and hagfishes. They have cartilaginous skulls and tooth-like structures composed of keratin. Habitat is Marine and fresh water animals and Ectoparasite on some fishes or scavengers.

Answer 2

Explanation:

The Cyclostomata are the modified and degenerate offshoot of the primitive vertebrate stalk. Due to their circular mouth, they are named Cyclostomata.

They are parasitic, usually feeding on fish in their adult stage. Morphologically, they resemble eels. They are known to be the only living vertebrates without true jaws, hence called Agnatha. Cyclostomata includes hagfishes and lampreys.

Characteristics of Cyclostomata

• The body is round and elongated like an eel.
• The paired fins are absent.
• Median fins with cartilaginous fin rays.
• No paired appendages.
• The skin is soft and smooth, devoid of any scales.

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