a similar situation is seen in larval anuran amphibians (tadpoles) in which the gills open into a surrounding water jacket which then opens to the exterior via a single opening.
(a similar situation; is seen; L:in larval anuran amphibians) (a surrounding water jacket; opens; to the exterior; T:then)
a similar situation a surrounding water jacket
is seen opens
L:in larval anuran amphibians
to the exterior T:then