When overcrowding occurred in the water, some of these fish, using their fins as rudimentary feet, took to the land and changed from gill breathing to lung breathing.
(overcrowding; occurred; L:in the water) (using their fins as rudimentary feet; changed; from gill breathing; to lung breathing; T:When overcrowding occurred in the water) (some of these fish; took; to the land; T:When overcrowding occurred in the water) Context(some of these fish took,List([41, 103))):(some of these fish; took using; their fins; as rudimentary feet)
some of these fish took,List([41, 103))
overcrowding using their fins as rudimentary feet some of these fish some of these fish
occurred changed took took using
L:in the water
from gill breathing to lung breathing T:When overcrowding occurred in the water
to the land T:When overcrowding occurred in the water
their fins as rudimentary feet