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