Lacrymaria olor is a protozoan, typically 100 micrometers (0.10 mm) long, that is found in freshwater ponds. Its name means “swan tear” in Latin, and refers to its general shape: namely, a teardrop-shaped body with a small “head” at the end of a long slender “neck”.
The animal is notable for its ability to extend the neck up to 7 times its body length, and manipulate in many directions — even around obstacles — in order to capture its food.
If you look closely you may see one snatching a meal.
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.