LIFE CYCLE There are four stages in the life of a horsehair worm: the egg, the preparasitic larva that hatches from the egg, the parasitic larva that develops within an invertebrate (its host), and the free-living aquatic adult.
(the preparasitic larva; hatches; from the egg) (the parasitic larva; develops; L:within an invertebrate)
the preparasitic larva the parasitic larva
hatches develops
from the egg
L:within an invertebrate