Cyclostomes are a____ but migrate for spawing to b____

Cyclostomes are marine but migrate to freshwater

Bird migrates for

Cyclostomes are ________ verterbrates.

Give one word for fishes like cyclostomes which migrate for spawning to fresh water from their marine habitat.

Cyclostomes are characterised by the

Cyclostomes are characterised by the

Siberian birds migrate from

Migration is