Introduction
Crustaceans are a diverse group of hard-shelled animals that live mostly in water. This group includes crabs, lobsters, shrimp, crayfish, krill, barnacles, and even tiny plankton-like copepods. They breathe through gills, have jointed legs, and are protected by a hard exoskeleton that they must shed as they grow. From deep-sea giants to microscopic species, crustaceans play a crucial role in the food chain and ocean ecosystems, and many of their collective nouns are just as interesting as the creatures themselves.
Collective Nouns for Crustaceans
| Animal | Collective Noun | Full Term | Scientific Name |
|---|---|---|---|
| Barnacles | Colony | A Colony of Barnacles | |
| Crabs | Cast | A Cast of Crabs | |
| Crabs | Consortium | A Consortium of Crabs | |
| Crayfish | Cast | A Cast of Crayfish | |
| Hermit Crabs | What is a Group of Hermit Crabs Called? | ||
| Krill | Swarm | A Swarm of Krill | |
| Lobsters | Risk | A Risk of Lobsters | |
| Prawns | What is a Group of Prawns Called? | ||
| Shrimp | Swarm | A Swarm of Shrimp | |
| Shrimp | Troup | A Troup of Shrimp |
Quick FAQ
Are crustaceans insects of the sea?
Not exactly, while they’re distantly related (both are arthropods), crustaceans have very different bodies and mostly live in aquatic environments.
Do all crustaceans live in saltwater?
No! Many live in freshwater, like crayfish, and some can even survive on land for short periods.
Why do crustaceans molt?
Their exoskeleton doesn’t stretch, so they must shed it and grow a new, larger shell to keep growing.
Interesting Facts
- A shrimp’s heart is located in its head, not its chest.
- Lobsters can live for decades, some over 100 years.
- Hermit crabs don’t grow their own shells; they borrow empty ones left by snails.
- The ocean’s largest animal migrations are driven by crustaceans, tiny krill and plankton moving up and down daily.
Before the Crab Walks Away…
Crustaceans might look tough with their armor-like shells and claws, but they are some of the most fascinating animals in the water. They clean the ocean, feed countless other species, and show off amazing behaviors, from digging burrows to trading shells. Their collective nouns give personality to these underwater characters, whether they gather in casts, bushels, or swarms. Dive into the list below and explore the clever group names used for crabs, shrimp, lobsters, and more!