# Crustaceans: Lobsters, barnacles, shrimp, and their relatives

Crustaceans SummaryDiscusses the ./ia metad, functions, habitats and economic value of crustaceans. Explains processes of food - gathering, reproduction, autotomy and molting. Alan Holden explains the nature of crystals, how they are formed, and why they are shaped as they are. He shows actual growth of crystals under a microscope, discusses how they may be grown, and relates these phenomena to the concept of atoms.

- Kind: Educational
- Year: 1956
- Runtime: 13 min
- By: Encyclopaedia Britannica Films, inc
- Genres: Education, Nature, Industrial and advertising
- Archive: [Internet Archive](https://archive.org/details/crustaceans)
- Licence or status: none stated by the archive
- Who can watch: Kids profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/crustaceans?play=1)