Biology ยท General Awareness

Aquatic and Marine Biology

1,834 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

What is the scientific name for the blue crab?

  1. Callinectes sapidus

  2. Cancer pagurus

  3. Portunus trituberculatus

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

Callinectes sapidus is the scientific name for the blue crab, a type of decapod crustacean.

Multiple choice

What is the scientific name for the Pacific oyster?

  1. Crassostrea gigas

  2. Ostrea edulis

  3. Mytilus edulis

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

Crassostrea gigas is the scientific name for the Pacific oyster, a type of bivalve mollusc.

Multiple choice

Which term refers to the practice of raising fish in an organic aquaculture system?

  1. Organic mariculture

  2. Organic apiculture

  3. Organic horticulture

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

Organic mariculture involves raising fish and other aquatic organisms in a controlled environment, adhering to organic standards, such as using organic feed, avoiding the use of antibiotics and chemicals, and maintaining water quality.

Multiple choice

Which of the following is a common data sharing platform used in oceanographic data management?

  1. Ocean Data Portal

  2. National Oceanographic Data Center (NODC)

  3. Global Ocean Observing System (GOOS)

  4. Intergovernmental Oceanographic Commission (IOC)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Ocean Data Portal is a widely used data sharing platform in oceanographic data management, providing access to a vast collection of oceanographic data from various sources, including research institutions, government agencies, and international organizations.

Multiple choice

Which critically endangered species is known for its exceptional diving abilities and long migrations?

  1. Leatherback Sea Turtle

  2. Blue Whale

  3. Humpback Whale

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

The Leatherback Sea Turtle is known for its exceptional diving abilities, reaching depths of over 1,000 meters, and its long migrations across vast oceans.

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

Which of these is a common adaptation among aquatic insects in riverine ecosystems?

  1. Streamlined body shape

  2. Gills for respiration

  3. Camouflage coloration

  4. Ability to withstand high water temperatures
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A streamlined body shape helps aquatic insects reduce drag and move efficiently through the flowing water of riverine ecosystems.

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 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 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.