| Post Name | FISHERIES ASSISTANT - FISHERIES DEPARTMENT |
|---|---|
| Question Paper Code | 169/2025 |
| Category Code | 104/2025 |
| Date of Test | 16 December 2025 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Pectoral fins of teleost fishes come under the classification of :
Answer
B. Paired fins
2
Fishes which can tolerate wide range of salinity are grouped under :
Answer
C. Euryhaline
3
Select the advantages of plant toxicants used in culture ponds from the following
statements :
Answer
D. All the above statements are correct
4
The reproductive organ of male penaeid shrimp is :
Answer
C. Petasma
5
Transparency is the maximum depth upto which light penetrates into the culture pond
water. The instrument used for measuring transparency is :
Answer
D. Secchi disc
6
Optimum pH to be maintained in fish culture pond is :
Answer
A. 7.5 – 8.5
7
Select an organic fertilizer from the following :
Answer
B. Cow dung
8
Chemical composition of dolomite used to maintain pH during the culture period is :
Answer
A. Anhydrous Calcium Magnesium Carbonate
9
In polyculture of Aquaculture systems :
Answer
C. Two or more compatible species are cultured together during culture period
10
The best method of eradication of aquatic insects from culture ponds prior to stocking is
the application of :
Answer
B. Soap-oil-emulsion
11
The maximum level of dissolved oxygen in a culture pond is noted during :
Answer
C. 2 – 3 PM
12
The main criteria to be followed while selecting a site for fish farm is :
Answer
D. All of the above
13
The Agency that regulates the activities connected with coastal Aquaculture is :
Answer
B. CAA
14
In order to avoid the adverse effects of farm drainage water on the ecology of the open
waters, Aquaculture farms are provided with :
Answer
A. Effluent Treatment System
15
Which of the following statements are correct about Pearl Spot :
(i) State Fish of Kerala
(ii) Euryhaline
(iii) Feeds on filamentous algae
(iv) Shows cannibalism
Answer
C. Only (i), (ii) and (iii)
16
Culture season of Mussels in Kerala :
Answer
A. January to May
17
Pick the odd man out :
Answer
D. Lates calcarifer
18
Shrimp feed type which contains more protein :
Answer
B. Starter
19
Correct statement pertaining to the role of phytoplankton in freshwater ponds for carp
culture :
(i) Natural food to zooplankton
(ii) Natural food to fishes
(iii) Improve water quality
(iv) Enhance oxygen levels
Answer
D. (i), (ii), (iii) and (iv)
20
Name the agency promoting aquaculture activities in Kerala :
Answer
D. ADAK
169/2025 5 A
21
Young ones of Mussels and Oysters are called as :
Answer
B. Spat
22
Which of the following fishes show ‘Cannibalism’?
Answer
D. All of the above
23
“Lab Lab” refers to :
Answer
C. A plant animal complex
24
Which of the following statements are correct about ‘Air Breathing Fishes”?
(i) Show cannibalism
(ii) Murrels and climbing Perch
(iii) Possess accessory respiratory organ
(iv) Shows high growth rate
Answer
C. (i), (ii) and (iii)
25
“Fattening” is a culture practice followed in :
Answer
D. Crab farming
26
Natural habitat of Giant Freshwater Prawn :
Answer
C. Vembanad Lake
27
Preferred fish species for culture in cages :
Answer
A. Tilapia
28
The concept of “Biosecurity” is NOT” related to :
(i) Timely harvest
(ii) Fencing of ponds
(iii) Screening of shrimp seeds for virus
(iv) Foot dip and Hand dip
Answer
A. Only (i)
29
Which of the following statement is/are correct about hermaphroditism?
(i) In sequential hermaphroditism, the fish changes sex at some point in its life
(ii) In Synchronous hermaphroditism, the fish possesses both male and female
reproductive organs and can produce both sperm and eggs simultaneously
(iii) In Protandry type of hermaphroditism, the fish starts as a male and later changes
to a female
(iv) In Protogyny type of hermaphroditism, the fish starts as a male and later changes
to a female
Answer
C. Only (i), (ii) and (iii)
30
Presently GIFT tilapia is being successfully produced and farmed in out country. Which
of the following statements are true regarding GIFT Tilapia?
(i) The main objective of the GIFT Tilapia program was to improve growth rate and
productivity
(ii) “GIFT” in GIFT Tilapia stands for Genetically improved Fresh Water Tilapia
(GIFT)
(iii) GIFT tilapia was developed by the World Fish Center with initial collaboration
from the Philippines and Norway
Answer
A. Only (i) and (iii)
31
The larvae of oysters that are ready to settle and attach to a substrate are called :
Answer
C. Pediveliger
32
Which type of hatchery system is typically used for rearing fish larvae in small, mesh-
covered enclosures in ponds or tanks?
Answer
C. Happa Hatchery
33
Which of the following statement is/are correct about induced breeding in fishes by using
pituitary gland extract?
(i) In India, first attempt to induced breeding was done on Labeo rohitha by Hamid
Khan in 1937
(ii) Brazil was the first country to develop hypophysation techniques
(iii) Pituitary glands extract from mature fish is commonly used for induced breeding in
carps
Answer
B. Only (ii) and (iii)
34
The sequence of larval stages of Penaeid Shrimp is :
Answer
A. Nauplius → Zoea → Mysis → Post-larvae
35
Match the List–I with List–II :
List I List II
Answer
C. Crassostrea madrasensis (iii) Giant fresh water prawn
36
The eggs of Lates calcarifer are :
Answer
B. Non-adhesive and pelagic
37
Which of the following scientists are credited with the first successful induced breeding
of Indian major carps in India in 1957?
Answer
A. Dr. Hiralal Chaudhuri and K.H. Alikunhi
38
Monosex male seed production in GIFT tilapia is mainly done using :
Answer
B. Hormonal sex reversal by using 17α-methyltestosterone
39
The stage of shrimp seed usually transported is :
Answer
D. Post-larvae
40
What is the advantage of Happa Hatchery systems in terms of flexibility compared to
other hatchery systems?
Answer
A. They can be easily moved between ponds or tanks based on water quality
conditions
41
The larval rearing of Macrobrachium rosenbergii requires which type of water?
Answer
B. Brackish water
42
Pearl spot fish is a ____________.
Answer
C. Nest builder and substrate spawner
43
Which families of fish are not coming under fresh water ornamental fish category?
Answer
C. Pomacentridae, Labridae
44
While constructing an aquarium tank, which material should be used to obtain the least
visual Distortion?
Answer
D. Glass
45
Which is an aquarium filter system mainly used in marine aquarium and reef aquarium
to remove organic waste before it decays?
Answer
C. Protein Skimmer
46
In an ornamental fish farm, the fish are seen gathered near the water surface, keeping
their mouths open, in the early morning. What is the reason for this?
Answer
A. Low dissolved oxygen
47
Which bacteria is required for the proper functioning of a biofilter?
Answer
C. Nitrosomonas
48
Which among the following is an egg scatter laying adhesive eggs?
Answer
C. Gold fish
49
When a fish farmer Universal Indicator Solution to the water from his pond, the water
turned orange red in colour. Which of the following statement is correct?
Answer
B. pH is less; add lime
50
The process by which an organism adjusts to gradual changes in its environment, over a
short period within its life time to minimise stress :
Answer
B. Acclimatization
51
Which statement is correct?
Answer
D. Artemia cyst need hydration and decapsulation
52
Which statement is true for male Poecilids?
Answer
B. Presence of gonopodium on the anal fin
53
Which is a common protozoan disease found in ornamental fish?
Answer
A. Ich disease
54
Which among the following is a correct pair?
Answer
A. Najas: Guppy grass
55
Which ornamental fish show parental care to its young ones?
Answer
Question Cancelled
56
Which among the following ornamental fish has a labyrinthine organ?
Answer
A. Gourami
57
Which of the following is an enzymatic change associated with fish spoilage?
Answer
D. Belly burst
58
Select a semi-fatty fish from below :
Answer
C. Ribbon fish
59
_____________ is a protein found in fish which helps in its muscle movement.
Answer
A. Myofibrillar protein
60
Select correct statement related to Kwashiorkor from below :
Answer
A. Protein deficiency disease
61
Identify the cooling substance made from carbondioxide from below :
Answer
B. Dry ice
62
In certain dried fish product, the surface of the product looks dried but interior remains
wet. What is this defect called?
Answer
C. Case hardening
63
Select the suitable substance which can be used to reduce drip-loss in frozen
products from below :
Answer
B. Polyphosphate
64
In certain shrimps formation of black spot is observed towards the interior surface of
its shell after catch. Select the correct statement related to the cause of this defect
from below :
Answer
C. Action of Tyrosinase of Tyrosine
65
Temperature range in which Slamonella lives best is :
Answer
D. 30°C to 37°C
66
Name a naturally occurring chemical hazard which often found in Scombroid fishes :
Answer
B. Histamine
67
“Bacillary dysentery” in human beings is caused by which of the following bacteria?
Answer
C. Shigella
68
According to EIA standards the process water in a seafood factory chlorinated to :
Answer
B. Below 2 ppm
69
Select the correct expanded form of HACCP from below :
Answer
D. Hazard Analysis and Critical Control Point
169/2025 13 A
70
Which of the following statement is/are correct about the Good Manufacturing Practices
(GMP) in a seafood factory?
(i) All walls in the processing area should be fitted with glazed tiles upto a height
of six feet.
(ii) Strong permanent concrete structures are not required for building.
(iii) All doors opening to outside in the processing units are fitted with air-curtains.
(iv) The plate freezers will freeze the product at –20°C for 90 minutes.
Answer
A. Only (i) and (iii)
71
Which of the following statement is/are correct about Fish marinades?
(i) Marinades are fish or fish portions processed by treatment with edible acid
and salt.
(ii) Development of microorganisms delayed in acid medium.
(iii) Marinades are classified into cooked marinades and fried marinades.
Answer
D. All of the above (i), (ii) and (iii)
72
Name the smoked fishery product famous in Lakshadweep, made from Tuna fish :
Answer
B. Masmin
73
Given below are some fishery value added products, select the breaded product :
Answer
D. Fish cutlet
74
Name the product from spermwhale which is used in Perfume Industry :
Answer
C. Ambergris
75
Beche-de-mer is a product prepared from :
Answer
B. Sea Cucumber
76
Name the fishery product prepared from shrimp or Crab shell waste :
Answer
A. Chitin
77
Write the method of packing that removes air from the package prior to sealing and
placed items in a plastic film package, removing air from inside and sealing the package:
Answer
C. AP)
78
Name the fishery product prepared from dried airbladder (Swim bladder) of fishes such
as polynemids, scianids etc. :
Answer
B. Ising glass
79
Identify the correct statement with respect to fishing craft :
(i) Traditional fishing craft includes ‘catamaram’ and ‘coracle’.
(ii) Ponton and bamboo rafts can be considered as fishing craft.
(iii) OBM is an essential component of dugout canoe.
(iv) Mechanized vessels use wind energy for propulsion.
Answer
D. (i) and (ii) only are correct
80
Read the statements regarding mechanized fishing crafts :
(i) Skiff is a part of trawler.
(ii) Long liners used baited hooks.
(iii) Anchovies are usually caught using troller.
(iv) Purse seiner uses trammel net in its fishing operation.
Answer
B. (ii) only is true
81
The purpose of “crow’s nest” in a purse seiner is :
Answer
B. To spot fish shoals
82
Snood wire and swivel are components of :
Answer
C. Long line
83
Given below are some points with respect to trawling :
(i) Use live baits
(ii) Entangling nets help in fishing
(iii) Otter boards keep the net vertically open
(iv) Target species are only pelagic fishes
Answer
D. (i), (ii), (iii) and (iv) are false
84
Jigs are commonly used to catch squid :
(i) Jigging is usually done in day time
(ii) Jigs are spindle shaped with attractive colour
(iii) It is a passive fishing method
(iv) They are usually operated from a coracle
Answer
A. (ii) only is true
85
Stake net fishing is a common practice in Kerala :
Answer
A. It is operated during low tide only
86
Select the correct statement regarding pole and line fishing :
Answer
C. Barbless hooks are used
87
Fishing craft building materials vary depending on type and its use :
Answer
D. All of these
88
Sustainable fishing practices include :
Answer
D. Establish closed fishing season
89
Which among the following net making materials is not a natural fibre?
Answer
D. Nylon
90
Treble hooks have :
Answer
A. 1 eye and 3 hooks
91
Oval shaped weights with a hole through the center is called as :
Answer
D. Egg Sinker
92
In which part of a trawl net the fishes get collected while fishing?
Answer
C. Codend
93
Which of these materials are not used to make floats?
(i) Aluminium
(ii) Wood
(iii) Cork
(iv) Glass
Answer
B. None of the above
94
Which one among the following is a surrounding gear?
(i) Beach seine (ii) Purse seine
(iii) Shore seine (iv) Ring seine
Answer
C. All of the above
95
Which among the following are deep sea shrimps?
(i) Heterocarpus gibbosus (ii) Portunus pelagicus
(iii) Aristeus alcocki (iv) Homarus americanus
Answer
C. (i) and (iii)
96
The transducer in an Echo-sounder :
Answer
A. Convert electrical energy to sound energy
97
Which among the following is not a life saving equipment onboard a fishing vessel?
Answer
Question Cancelled
98
Which among the following activities support sustainable fishing?
(i) Trawl ban (ii) Mesh size regulation
(iii) Sea ranching (iv) Installation of artificial reefs
Answer
D. All of the above
99
Which among the following are destructive fishing practices?
(i) Dynamite fishing (ii) Cyanide fishing
(iii) Bottom trawling (iv) Muroami fishing
Answer
D. All of the above
100
Which among the following is used to estimate the vertical and horizontal opening of a
trawl net?
Answer
A. Net sounder
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