As an illustration of this metamorphosis, we give figures of the zoea Taurus in two states, viz., Fig.
It was called a zoea; but you can call it a Crab caterpillar or larva.
The maggot is the larva of the fly, and the zoea is the larva of the Crab.
With crowds of its brothers and sisters, the zoea kicks about on the surface of the sea.
You ask about the skipping of the zoea stage in fresh-water decapods: is this an illustration of acceleration?