Crustacean Kingdom

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10 Questions

What is the body structure of crustaceans?

Bilaterally symmetrical with cephalon, thorax, and abdomen

What type of eyes do crustaceans have?

Compound eyes on stalks

Which statement about reproduction in crustaceans is true?

Sexual reproduction is common

What are examples of crustaceans?

Crabs, lobsters, and shrimps

Where do most crustaceans live?

Aquatic environments

What are some examples of crustaceans mentioned in the text?

crabs, lobsters, crayfish, shrimps, prawns, krill, woodlice, barnacles

What is the body structure of crustaceans?

bilaterally symmetrical consisting of cephalon (head), thorax, and abdomen; covered externally with a chitinous cuticle; have compound eyes on stalks and two pairs of antennae

How do crustaceans obtain nutrients?

Some crustaceans are filter feeders, while others are active predators. Few crustaceans scavenge nutrients from detritus.

What is the reproductive method of crustaceans?

Sexual reproduction is common, but parthenogenesis occurs among branchiopods and certain ostracods. Sexes are usually separate except for the sessile cirripedes, some parasitic isopods and few decapods are hermaphroditic.

Where do most crustaceans live?

Most crustaceans are aquatic, living in either marine or freshwater environments. However, a few groups have adapted to life on land, such as terrestrial crabs, and terrestrial hermit crabs.

Study Notes

Body Structure

  • Crustaceans have a body divided into two main parts: the cephalothorax (head and thorax) and the abdomen.
  • They have a tough outer shell called an exoskeleton that provides protection and support.


  • Crustaceans have compound eyes that are made up of many small lenses, giving them excellent vision.


  • Most crustaceans reproduce sexually, with males transferring sperm to females during mating.

Examples of Crustaceans

  • Examples of crustaceans include crabs, lobsters, shrimp, crayfish, and krill.


  • Most crustaceans live in water, with some species found in freshwater and others in saltwater.
  • Some crustaceans, such as woodlice and pill bugs, live on land.


  • Crustaceans obtain nutrients by filtering small particles from the water or by actively capturing prey.

Note: Since the questions were repetitive, the study notes focused on the main points, avoiding repetition.

Test your knowledge of marine science with this quiz on the kingdom Animalia, specifically focusing on the phylum Arthropoda and its subphylum Crustacea. Explore the diverse world of crustaceans, including crabs, lobsters, shrimps, and more. Ideal for students of marine science and anyone interested in marine life.

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