A larva (plural larvae /ˈlɑːrviː/) is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle.
The larva’s appearance is generally very different from the adult form (e.g. caterpillars and butterflies). A larva often has unique structures and organs that do not occur in the adult form. Their diet may also be considerably different.
The mostly unseen world in a drop of water houses a micro universe of life. Here is a seldom seen interaction of an insect larva catching and eating a nematode. All this happens at a scale that is not visible to the human eye.