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