The Harlequin frog tadpoles develop in fast running streams and the tadpoles' mouth acts as a section disc to attach it to the rock.
(The Harlequin frog tadpoles; develop; L:in fast running streams) (the tadpoles' mouth; acts; as a section disc)
The Harlequin frog tadpoles the tadpoles' mouth
develop acts
L:in fast running streams
as a section disc