[3] The Caspian lamprey is a slim-bodied, eel-like fish that grows to a length of about 40 cm (16 in).

The longest recorded specimen was 55 cm (22 in) long and weighed 206 g (7.3 oz).

Like other lampreys, it has no jaws, but it has a round oral disc surrounding the mouth.

It is now an uncommon fish because its migratory routes have been disrupted by dams and construction projects and it can no longer reach its spawning grounds.

The chief threat more recently has been the drying up of these streams caused by drought.