amphipod

/'æmfipɔd/

Thân thiện

A marine biologist carefully observes a tiny amphipod in a clear sample jar.

Definition

1. Noun:
   • A type of malacostracan crustacean: An amphipod is a small, primarily aquatic crustacean belonging to the order Amphipoda. They are characterized by a laterally compressed body and the absence of a carapace. They are commonly found in marine environments, but some species inhabit freshwater or moist terrestrial habitats.

Usage Examples

• Noun:
  • The biologist studied the diverse population of amphipods living in the coral reef.
  • Sand fleas, often found on beaches, are a common type of marine amphipod.
  • Freshwater amphipods, like scuds, are important for the health of stream ecosystems.

Advanced Usage

• Ecological Role: Amphipods are often discussed in ecology as important detritivores and a food source for larger animals.

  • The decline in amphipod populations can significantly impact fish stocks that depend on them.

• Taxonomic Context: Used in scientific classification to specify an order within the class Malacostraca.

  • The order Amphipoda is one of the most diverse groups within the Peracarida.

Variants and Related Words

• Amphipodan (adj): Relating to or characteristic of amphipods.

  • The researcher noted the amphipodan features of the specimen.

• Gammarid (n): A common family of amphipods (Gammaridae), often used as a representative example.

  • The gammarid is a well-studied model amphipod.

Synonyms

• Scud (common name for some freshwater amphipods)
• Beach flea or sand hopper (common names for some terrestrial/marine amphipods)

Related Phrases

• Amphipod swarm: A large, dense aggregation of amphipods.
  • The whale shark was feeding on an amphipod swarm near the surface.

Related Idioms

(No common idioms are directly based on the word "amphipod" due to its specific scientific nature.)

Học thuật

Noun

1. a kind of malacostracan crustacean