| The nauplius basically walks through the water, pushing itself off against the viscous medium which starts to rotate. |
| It is evident that the Leptus fundamentally differs from the nauplius and begins life on a higher plane. |
| In Penaeus the nauplius changes to metanauplius which is followed by protozoa, zoaea and mysis stages before adult form is reached. |
| A nauplius consists of the first three cephalic segments and the appendages belonging to those segments, the antennules, antennae, and mandibles. |
| But instead of rising to its opportunities, the sacculine nauplius having reached a certain point turned back. |
| The nauplius, unlike the larv which we have been considering, has an unsegmented body, and has only three pairs of limbs. |
