Biology ยท General Awareness

Aquatic and Marine Biology

1,905 Questions

This hub covers key concepts in aquatic and marine biology, including fish anatomy, marine animal behavior, and commercial fisheries. These topics are essential for general science sections in various competitive exams. Use these resources to test your knowledge of diverse aquatic ecosystems.

Marine animal adaptationsCommercial fisheriesFish anatomyAquatic ecosystems

Aquatic and Marine Biology Questions

Multiple choice

Which critically endangered species is known for its exceptional camouflage abilities and its ability to change color?

  1. Chameleon

  2. Octopus

  3. Cuttlefish

  4. Leaf Insect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Chameleon, known for its exceptional camouflage abilities and its ability to change color, is critically endangered due to habitat loss and illegal wildlife trade.

Multiple choice

Which of the following is an example of a keystone species?

  1. Sea otter

  2. Coral

  3. African wild dog

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sea otters, coral, and African wild dogs are all examples of keystone species that play a crucial role in maintaining the structure and function of their respective ecosystems.

Multiple choice

Which of these aquatic organisms is known for its ability to migrate long distances between freshwater and saltwater environments?

  1. Salmon

  2. Trout

  3. Carp

  4. Catfish
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salmon are renowned for their remarkable ability to migrate between freshwater and saltwater environments during their life cycle.

Multiple choice

What is the name of the fish depicted on the reverse of the 1995 500-franc coin issued by France?

  1. Salmon

  2. Trout

  3. Carp

  4. Pike
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The 1995 500-franc coin issued by France features a salmon on its reverse side.

Multiple choice

What is the name of the fish depicted on the reverse of the 1973 100-franc coin issued by France?

  1. Cod

  2. Haddock

  3. Whiting

  4. Pollock
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The 1973 100-franc coin issued by France features a cod on its reverse side.

Multiple choice

What is the name of the fish depicted on the reverse of the 1996 200-franc coin issued by France?

  1. Herring

  2. Mackerel

  3. Sardine

  4. Anchovy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The 1996 200-franc coin issued by France features a herring on its reverse side.

Multiple choice

What is the name of the fish depicted on the reverse of the 2013 200-franc coin issued by France?

  1. Trout

  2. Carp

  3. Pike

  4. Eel
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The 2013 200-franc coin issued by France features a trout on its reverse side.

Multiple choice

What are the main types of fishing gear regulated under the Marine Fisheries Regulation Act, 1983?

  1. Trawls

  2. Gillnets

  3. Longlines

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Marine Fisheries Regulation Act, 1983 regulates the use of various types of fishing gear, including trawls, gillnets, longlines, and other fishing methods. It aims to prevent overfishing and protect marine ecosystems by controlling the type and quantity of fishing gear used.

Multiple choice

Which marine species is most vulnerable to bycatch, the accidental capture of non-target species during fishing?

  1. Tuna

  2. Sharks

  3. Dolphins

  4. Sea Turtles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sea turtles are particularly susceptible to bycatch due to their slow swimming speed and tendency to inhabit areas where fishing activities are common.

Multiple choice

Which marine species is known for its ability to filter large volumes of water, removing pollutants and improving water quality?

  1. Oysters

  2. Clams

  3. Mussels

  4. Scallops
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oysters are filter feeders that play a crucial role in improving water quality by removing pollutants and excess nutrients from the water.

Multiple choice

Which fishing practice involves dragging a heavy net along the seafloor, causing significant damage to marine habitats?

  1. Trawling

  2. Gillnetting

  3. Longlining

  4. Seine Fishing
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Trawling involves dragging a large net along the seafloor, often resulting in the destruction of marine habitats and the capture of non-target species.

Multiple choice

Which of the following is an example of a sustainable seafood choice?

  1. Salmon farmed in open-net pens

  2. Tuna caught using drift nets

  3. Shrimp harvested from mangrove forests

  4. Mackerel caught using sustainable fishing methods
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sustainable fishing methods, such as pole-and-line fishing or selective gear, minimize bycatch and help preserve marine ecosystems.

Multiple choice

Which of the following is an example of a sustainable seafood choice?

  1. Shark fin soup

  2. Bluefin tuna

  3. Farmed salmon

  4. Wild-caught sardines
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Wild-caught sardines are a sustainable seafood choice due to their abundance and low environmental impact compared to other species.

Multiple choice

Which marine species is most affected by entanglement in plastic waste?

  1. Sea Turtles

  2. Whales

  3. Dolphins

  4. Fish
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sea turtles are particularly vulnerable to entanglement in plastic debris, which can restrict their movement, cause injury, and lead to death.

Multiple choice

Which fishing practice is known for its indiscriminate catch and bycatch of marine life?

  1. Trawling

  2. Gillnetting

  3. Longlining

  4. Spearfishing
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Trawling involves dragging a large net along the seafloor, capturing a wide range of marine life, including non-target species and juveniles.