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How to Identify and Classify Shrimp
Contributed by: Wallis
  • 1. What is the primary body section that distinguishes shrimp from other crustaceans?
A) Elongated abdomen with swimming pleopods
B) Flattened body
C) Large claws
D) Lack of antennae
  • 2. Which feature is NOT typically used to classify shrimp?
A) Gill structure
B) Shape of telson
C) Presence of rostrum teeth
D) Eye color
  • 3. What is the rostrum?
A) The walking legs
B) The spine projecting from the head
C) The internal skeleton
D) The tail fan
  • 4. Penaeid shrimp are characterized by having...
A) External gills
B) Lamellar gills
C) Branched gills
D) No gills
  • 5. Caridean shrimp are characterized by having...
A) Branched gills
B) External gills
C) Lamellar gills
D) No gills
  • 6. Which is a common identifying characteristic of Penaeid shrimp?
A) A very short rostrum
B) Rostrum with teeth both dorsal and ventral
C) No rostrum
D) Rostrum with teeth only on the dorsal side
  • 7. Which is a common identifying characteristic of Caridean shrimp?
A) Rostrum typically with teeth only on the dorsal side
B) A very short rostrum
C) No rostrum
D) Rostrum with teeth both dorsal and ventral
  • 8. What are pleopods used for?
A) Swimming
B) Digging
C) Walking
D) Grasping prey
  • 9. What is the telson?
A) A walking leg
B) The heart
C) An antenna
D) The central part of the tail fan
  • 10. Why is gill structure important for shrimp classification?
A) It is related to the shrimp's color
B) It indicates the shrimp's diet
C) It differentiates between Penaeid and Caridean shrimp
D) It determines the shrimp's swimming speed
  • 11. Which family do tiger prawns belong to?
A) Penaeidae
B) Alpheidae
C) Caridae
D) Palaemonidae
  • 12. Which of these is a Caridean shrimp?
A) Whiteleg Shrimp
B) Cleaner Shrimp
C) Brown Shrimp
D) Pink Shrimp
  • 13. What type of environment do many Caridean shrimp inhabit?
A) Polar regions
B) Freshwater or brackish water
C) Deep sea vents
D) Open ocean
  • 14. What is the function of the carapace?
A) Protects the cephalothorax
B) Used for swimming
C) Used for feeding
D) Used for sensing
  • 15. What are pereiopods?
A) Swimming legs
B) Mouthparts
C) Walking legs
D) Antennae
  • 16. Which is the primary way shrimp osmoregulate?
A) Exoskeleton
B) Heart
C) Gills
D) Antennae
  • 17. What is the function of uropods?
A) Help form the tail fan for swimming
B) Used for sensing chemicals
C) Used for walking
D) Used for feeding
  • 18. What does the term 'decapod' refer to?
A) Ten legs
B) Twelve legs
C) No legs
D) Five legs
  • 19. What is the significance of the hepatic spines in shrimp classification?
A) They determine swimming speed
B) They are always absent
C) They are present or absent depending on the species
D) They are always present
  • 20. Which type of shrimp is known for its symbiotic relationships?
A) All shrimp
B) No shrimp
C) Caridean shrimp (some species)
D) Penaeid shrimp
  • 21. What is the most common commercial use of shrimp?
A) Food
B) Aquarium pets
C) Scientific research only
D) Medicine
  • 22. How are shrimp typically harvested?
A) Hand-picking only
B) Bait traps only
C) Spearfishing
D) Trawling
  • 23. What is the molting process in shrimp?
A) Hibernation
B) Shedding of the exoskeleton
C) Regrowing lost limbs
D) Changing color
  • 24. What is the meaning of the term 'benthic' when referring to shrimp?
A) Living in the water column
B) Living on land
C) Living on or near the seafloor
D) Living in freshwater
  • 25. The presence or absence of a postorbital spine can help classify shrimp. Where is it located?
A) On the walking legs
B) Behind the eye
C) On the tail
D) On the rostrum
  • 26. Which of the following characteristics is LEAST helpful in identifying shrimp species?
A) Weight
B) Arrangement of gills
C) Shape of the carapace
D) Number of rostrum teeth
  • 27. What is the primary food source for many shrimp species?
A) Detritus and small organisms
B) Sunlight
C) Large fish
D) Seaweed only
  • 28. What role do shrimp play in the marine ecosystem?
A) Both prey and predator
B) Only prey
C) Decomposers only
D) Only predator
  • 29. What is the function of the statocyst in shrimp?
A) Balance and orientation
B) Seeing underwater
C) Pumping blood
D) Smelling food
  • 30. What is a 'mysis' stage in shrimp development?
A) A larval stage
B) An adult stage
C) A reproductive stage
D) A molting stage
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