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Coelenterate: meaning, definitions and examples

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coelenterate

 

[siːˈlɛn.təˌreɪt ]

Definition

Context #1 | Noun

biological classification

Coelenterates, also known as cnidarians, are a diverse group of simple animals that include jellyfish, corals, and sea anemones. They are characterized by their radially symmetrical bodies and the presence of specialized cells called cnidocytes, which contain stinging structures. Coelenterates typically have a two-layered body wall and a central digestive cavity. They can exist in solitary or colonial forms, playing crucial roles in marine ecosystems.

Synonyms

cnidarian.

Examples of usage

  • Jellyfish are a type of coelenterate.
  • Coral reefs are formed by coelenterate polyps.
  • Coelenterates exhibit diverse forms of reproduction.

Interesting Facts

Etymology

  • The term comes from the Greek words 'coelo,' meaning hollow, and 'enteron,' meaning gut, indicating these creatures have a central cavity.
  • This group of animals was commonly referred to as 'radiate animals' in early biological classifications because of their radial symmetry.

Biology

  • Coelenterates have two main body forms: polyps (like sea anemones) and medusae (like jellyfish).
  • They typically possess tentacles armed with stinging cells called cnidocytes, which are used for capturing prey and defense.

Ecology

  • These animals play a crucial role in ocean ecosystems, serving as both predators and prey, thus maintaining the food web.
  • Coral reefs, formed by coelenterates, provide habitat for numerous marine species and protect coastlines from erosion.

Pop Culture

  • Jellyfish and other coelenterates appear frequently in movies and documentaries, symbolizing mysterious and ancient sea life.
  • The beauty and bioluminescence of some species have inspired artists and filmmakers, like in the animated film 'Finding Nemo.'

Research

  • Studies on certain jellyfish species have led to breakthroughs in biotechnology, particularly in understanding regenerative organisms.
  • Research into coral reefs has highlighted their sensitivity to climate change, drawing attention to conservation efforts worldwide.

Word Frequency Rank

At position #40,245, this word is among the less frequently used terms in English. While interesting to know, it's not crucial for most English learners unless needed for specific purposes.