lancelet
/ˈlænslɪt/
noun
- A small, fish-like sea animal that lives in sand and has a simple body without a backbone, considered a primitive relative of vertebrates.
- A lancelet looks like a tiny, transparent fish but has no true skull or backbone.
- The lancelet is often studied by scientists to understand the evolution of backbones.
- Lancelets bury themselves in the sand and filter food from the water.
Synonyms