How to Identify and Classify Shrimp
  • 1. What is the primary body section that distinguishes shrimp from other crustaceans?
A) Large claws
B) Flattened body
C) Lack of antennae
D) Elongated abdomen with swimming pleopods
  • 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 tail fan
B) The internal skeleton
C) The spine projecting from the head
D) The walking legs
  • 4. Penaeid shrimp are characterized by having...
A) Lamellar gills
B) No gills
C) External gills
D) Branched gills
  • 5. Caridean shrimp are characterized by having...
A) Lamellar gills
B) External gills
C) No gills
D) Branched gills
  • 6. Which is a common identifying characteristic of Penaeid shrimp?
A) No rostrum
B) Rostrum with teeth both dorsal and ventral
C) Rostrum with teeth only on the dorsal side
D) A very short rostrum
  • 7. Which is a common identifying characteristic of Caridean shrimp?
A) A very short rostrum
B) Rostrum typically with teeth only on the dorsal side
C) Rostrum with teeth both dorsal and ventral
D) No rostrum
  • 8. What are pleopods used for?
A) Swimming
B) Walking
C) Grasping prey
D) Digging
  • 9. What is the telson?
A) The heart
B) An antenna
C) The central part of the tail fan
D) A walking leg
  • 10. Why is gill structure important for shrimp classification?
A) It is related to the shrimp's color
B) It differentiates between Penaeid and Caridean shrimp
C) It indicates the shrimp's diet
D) It determines the shrimp's swimming speed
  • 11. Which family do tiger prawns belong to?
A) Alpheidae
B) Caridae
C) Penaeidae
D) Palaemonidae
  • 12. Which of these is a Caridean shrimp?
A) Brown Shrimp
B) Cleaner Shrimp
C) Pink Shrimp
D) Whiteleg Shrimp
  • 13. What type of environment do many Caridean shrimp inhabit?
A) Freshwater or brackish water
B) Polar regions
C) Deep sea vents
D) Open ocean
  • 14. What is the function of the carapace?
A) Used for sensing
B) Used for swimming
C) Protects the cephalothorax
D) Used for feeding
  • 15. What are pereiopods?
A) Mouthparts
B) Swimming legs
C) Antennae
D) Walking legs
  • 16. Which is the primary way shrimp osmoregulate?
A) Heart
B) Antennae
C) Exoskeleton
D) Gills
  • 17. What is the function of uropods?
A) Used for sensing chemicals
B) Used for walking
C) Help form the tail fan for swimming
D) Used for feeding
  • 18. What does the term 'decapod' refer to?
A) Five legs
B) No legs
C) Ten legs
D) Twelve legs
  • 19. What is the significance of the hepatic spines in shrimp classification?
A) They are present or absent depending on the species
B) They determine swimming speed
C) They are always absent
D) They are always present
  • 20. Which type of shrimp is known for its symbiotic relationships?
A) Penaeid shrimp
B) Caridean shrimp (some species)
C) All shrimp
D) No shrimp
  • 21. What is the most common commercial use of shrimp?
A) Aquarium pets
B) Scientific research only
C) Medicine
D) Food
  • 22. How are shrimp typically harvested?
A) Trawling
B) Spearfishing
C) Bait traps only
D) Hand-picking only
  • 23. What is the molting process in shrimp?
A) Shedding of the exoskeleton
B) Regrowing lost limbs
C) Hibernation
D) Changing color
  • 24. What is the meaning of the term 'benthic' when referring to shrimp?
A) Living on land
B) Living on or near the seafloor
C) Living in freshwater
D) Living in the water column
  • 25. The presence or absence of a postorbital spine can help classify shrimp. Where is it located?
A) On the rostrum
B) On the walking legs
C) Behind the eye
D) On the tail
  • 26. Which of the following characteristics is LEAST helpful in identifying shrimp species?
A) Arrangement of gills
B) Number of rostrum teeth
C) Weight
D) Shape of the carapace
  • 27. What is the primary food source for many shrimp species?
A) Sunlight
B) Large fish
C) Detritus and small organisms
D) Seaweed only
  • 28. What role do shrimp play in the marine ecosystem?
A) Both prey and predator
B) Decomposers only
C) Only predator
D) Only prey
  • 29. What is the function of the statocyst in shrimp?
A) Smelling food
B) Pumping blood
C) Seeing underwater
D) Balance and orientation
  • 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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